Auto merge of #62733 - ehuss:update-mdbook, r=alexcrichton

Update mdbook, cargo, books

This updates the last of the books using mdbook 0.1, finally removing it from the build.  Cargo, the reference, and the rustc book were the last to change.  This should have a noticeable impact on CI times.

I decided to remove the version switcher from the rustbook tool.  It seemed a little awkward keeping it with one version.  If we ever need it in the future, we can always add it back, it is a relatively small amount of code.  I would just like to avoid the temptation to split the versions in the future.

## cargo

12 commits in 677a180f4c8ca1dcef594f68dd0e63e4f08621f5..e3563dbdcd2e370bc4f11d080f739d82d25773fd
2019-07-08 13:43:02 +0000 to 2019-07-16 19:22:44 +0000
- Add Cirrus CI badge to manifest (rust-lang/cargo#7119)
- Update mdbook to 0.3. (rust-lang/cargo#7140)
- Remove unused feature filter. (rust-lang/cargo#7131)
- Remove now-unused `WorkspaceResolve` (rust-lang/cargo#7127)
- Fix some clippy warnings. (rust-lang/cargo#7135)
- Also ignore remap-path-prefix in metadata for `cargo rustc`. (rust-lang/cargo#7134)
- Fix some formatting for some strings. (rust-lang/cargo#7129)
- Handle activation conflicts for `[patch]` sources (rust-lang/cargo#7118)
- [BETA] Fix `cargo new` in root directory. (rust-lang/cargo#7126)
- Remove MyFnOnce (rust-lang/cargo#7125)
- Don't suppress error messages with `-q` (rust-lang/cargo#7116)
- Fix changelog date (rust-lang/cargo#7115)

## book

2 commits in 6c0d83499c8e77e06a71d28c5e1adccec278d4f3..7ddc46460f09a5cd9bd2a620565bdc20b3315ea9
2019-06-23 20:25:30 -0400 to 2019-06-27 09:50:36 -0400
- reexport to re-export
- Fixes made in final layout check

## reference

4 commits in 7a5aab5fd50d6290679beb4cf42fa5f46ed22aec..8e7d614303b0dec7492e048e63855fcd3b944ec8
2019-06-20 17:38:52 +0200 to 2019-07-16 21:02:33 +0100
- Update to mdbook 0.3. (rust-lang-nursery/reference#641)
- Remove extra parenthesis (rust-lang-nursery/reference#621)
- Correct sentence about unsized coercions (rust-lang-nursery/reference#628)
- unions: call out field offset issues (rust-lang-nursery/reference#627)

## edition-guide

4 commits in f8072acde5ce29c7570d7986180bbded2d22e287..f6c8b92d4e63edd28e862be952f33861f35956f8
2019-06-14 23:27:05 +0200 to 2019-07-06 22:10:32 +0200
- Fix syntax highlighting in macro guide (rust-lang-nursery/edition-guide#182)
- Fix error example for modern compilers. (rust-lang-nursery/edition-guide#160)
- Try cargo install-upgrade for mdbook. (rust-lang-nursery/edition-guide#181)
- correct the travis build badge URL (rust-lang-nursery/edition-guide#180)

## embedded-book

2 commits in ef27b517dcd0b990c888c0d7caeff52a5a115619..ff334e74fdb9f197e621efa6d7c3105be892e888
2019-06-18 22:59:47 +0000 to 2019-07-16 13:47:34 +0000
- use_core() is required for #![no_std] compatible generated bindings  (rust-embedded/book#197)
- concurrency: update shared resource examples  (rust-embedded/book#196)

## nomicon

7 commits in 341c221116a8b9f1010cf1eece952b80c5ec7f54..b7f0aba2f88a8feade70595efcfa3438e54e96c0
2019-06-19 09:08:47 -0700 to 2019-07-11 15:11:36 -0400
- chore: Remove redundant Eq import
- Fix link to rfc1857
- Move word "reading" out of the link to "The Book"
- update the link to `mdbook`
- re-wrap more text
- re-wrap the text to 80 columns
- Better explain how to use `mdbook`

## rust-by-example

8 commits in 62b3ff2cb44dd8b648c3ef2a9347c3706d148014..e3679e214d8db44586aca9b20aa27517007d1923
2019-06-24 09:17:21 -0300 to 2019-07-15 11:13:44 -0300
- Collection of fixes for the 'Vectors` chapter. (rust-lang/rust-by-example#1216)
- Changed mutable collected_iterator into immutable (rust-lang/rust-by-example#1219)
- Fix minor formatting inconsistencies (rust-lang/rust-by-example#1220)
- Make `use` example runnable (rust-lang/rust-by-example#1215)
- Fix: Automatically Typo (rust-lang/rust-by-example#1214)
- Collection of fixes for the `Strings` chapter. (rust-lang/rust-by-example#1212)
- Added link to russian translation (rust-lang/rust-by-example#1213)
- A couple of fixes for the `HashMap` chapter. (rust-lang/rust-by-example#1211)

13 files changed, 76 insertions, 342 deletions

diff --git a/Cargo.lock b/Cargo.lock
index aaf39e120ac..a8e9850e643 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -7,14 +7,6 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "aho-corasick"
-version = "0.6.9"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "memchr 2.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "aho-corasick"
 version = "0.7.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
@@ -33,20 +25,7 @@ dependencies = [
 
 [[package]]
 name = "ammonia"
-version = "1.2.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "html5ever 0.22.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "maplit 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "matches 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "tendril 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "url 1.7.2 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "ammonia"
-version = "2.1.1"
+version = "2.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "html5ever 0.23.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -158,11 +137,6 @@ dependencies = [
 
 [[package]]
 name = "bitflags"
-version = "0.9.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[[package]]
-name = "bitflags"
 version = "1.0.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
@@ -199,7 +173,7 @@ dependencies = [
  "petgraph 0.4.13 (registry+https://github.com/rust-lang/crates.io-index)",
  "pretty_assertions 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.92 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.33 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.40 (registry+https://github.com/rust-lang/crates.io-index)",
  "time 0.1.40 (registry+https://github.com/rust-lang/crates.io-index)",
  "toml 0.4.10 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -313,7 +287,7 @@ dependencies = [
  "semver 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.92 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_ignored 0.0.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.33 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.40 (registry+https://github.com/rust-lang/crates.io-index)",
  "shell-escape 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "strip-ansi-escapes 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "tar 0.4.20 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -344,7 +318,7 @@ dependencies = [
  "semver 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.92 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_derive 1.0.81 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.33 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.40 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -511,7 +485,7 @@ dependencies = [
  "regex 1.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustfix 0.4.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.92 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.33 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.40 (registry+https://github.com/rust-lang/crates.io-index)",
  "walkdir 2.2.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -531,7 +505,7 @@ dependencies = [
  "rustfix 0.4.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.92 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_derive 1.0.81 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.33 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.40 (registry+https://github.com/rust-lang/crates.io-index)",
  "tempfile 3.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "tester 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -572,7 +546,7 @@ dependencies = [
  "http 0.1.16 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.92 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_derive 1.0.81 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.33 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.40 (registry+https://github.com/rust-lang/crates.io-index)",
  "url 1.7.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -845,7 +819,7 @@ dependencies = [
  "regex 1.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.92 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_derive 1.0.81 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.33 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.40 (registry+https://github.com/rust-lang/crates.io-index)",
  "strum 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "strum_macros 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -874,7 +848,6 @@ dependencies = [
  "atty 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)",
  "humantime 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "regex 1.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "termcolor 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -892,14 +865,6 @@ dependencies = [
 
 [[package]]
 name = "error-chain"
-version = "0.11.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "backtrace 0.3.29 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "error-chain"
 version = "0.12.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
@@ -1153,24 +1118,10 @@ dependencies = [
 
 [[package]]
 name = "handlebars"
-version = "0.32.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "log 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "pest 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "pest_derive 1.0.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "quick-error 1.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "regex 1.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde 1.0.92 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.33 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "handlebars"
-version = "1.1.0"
+version = "2.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
+ "hashbrown 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "pest 2.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1178,7 +1129,7 @@ dependencies = [
  "quick-error 1.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "regex 1.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.92 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.33 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.40 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -1192,6 +1143,14 @@ dependencies = [
 ]
 
 [[package]]
+name = "hashbrown"
+version = "0.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "serde 1.0.92 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
 name = "heck"
 version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -1215,19 +1174,6 @@ dependencies = [
 
 [[package]]
 name = "html5ever"
-version = "0.22.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "log 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "mac 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "markup5ever 0.7.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "proc-macro2 0.4.30 (registry+https://github.com/rust-lang/crates.io-index)",
- "quote 0.6.12 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 0.15.35 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "html5ever"
 version = "0.23.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
@@ -1452,7 +1398,7 @@ dependencies = [
  "log 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.92 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_derive 1.0.81 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.33 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.40 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -1580,7 +1526,7 @@ version = "0.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "bytes 0.4.11 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.33 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.40 (registry+https://github.com/rust-lang/crates.io-index)",
  "tokio-codec 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -1594,7 +1540,7 @@ dependencies = [
  "num-traits 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.92 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_derive 1.0.81 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.33 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.40 (registry+https://github.com/rust-lang/crates.io-index)",
  "url 1.7.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "url_serde 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -1627,21 +1573,6 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "markup5ever"
-version = "0.7.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "phf 0.7.24 (registry+https://github.com/rust-lang/crates.io-index)",
- "phf_codegen 0.7.24 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde 1.0.92 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_derive 1.0.81 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.33 (registry+https://github.com/rust-lang/crates.io-index)",
- "string_cache 0.7.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "string_cache_codegen 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "tendril 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "markup5ever"
 version = "0.8.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
@@ -1650,7 +1581,7 @@ dependencies = [
  "phf_codegen 0.7.24 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.92 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_derive 1.0.81 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.33 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.40 (registry+https://github.com/rust-lang/crates.io-index)",
  "string_cache 0.7.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "string_cache_codegen 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "tendril 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1663,44 +1594,16 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "mdbook"
-version = "0.1.7"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "ammonia 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "chrono 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "clap 2.32.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "elasticlunr-rs 2.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "env_logger 0.5.13 (registry+https://github.com/rust-lang/crates.io-index)",
- "error-chain 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "handlebars 0.32.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "itertools 0.7.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "log 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "memchr 2.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "open 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "pulldown-cmark 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "regex 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde 1.0.92 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_derive 1.0.81 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.33 (registry+https://github.com/rust-lang/crates.io-index)",
- "shlex 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "tempfile 3.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "toml 0.4.10 (registry+https://github.com/rust-lang/crates.io-index)",
- "toml-query 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "mdbook"
-version = "0.3.0"
+version = "0.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "ammonia 2.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "ammonia 2.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "chrono 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "clap 2.32.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "elasticlunr-rs 2.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "env_logger 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "error-chain 0.12.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "handlebars 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "handlebars 2.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "itertools 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1710,7 +1613,7 @@ dependencies = [
  "regex 1.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.92 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_derive 1.0.81 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.33 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.40 (registry+https://github.com/rust-lang/crates.io-index)",
  "shlex 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "tempfile 3.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "toml 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1725,7 +1628,7 @@ dependencies = [
  "env_logger 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "failure 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "mdbook 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "mdbook 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "memchr 2.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "pulldown-cmark 0.5.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "rayon 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1734,7 +1637,7 @@ dependencies = [
  "semver 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.92 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_derive 1.0.81 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.33 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.40 (registry+https://github.com/rust-lang/crates.io-index)",
  "structopt 0.2.18 (registry+https://github.com/rust-lang/crates.io-index)",
  "url 1.7.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -2098,11 +2001,6 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "pest"
-version = "1.0.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[[package]]
-name = "pest"
 version = "2.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
@@ -2111,16 +2009,6 @@ dependencies = [
 
 [[package]]
 name = "pest_derive"
-version = "1.0.8"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "pest 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "quote 0.3.15 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 0.11.11 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "pest_derive"
 version = "2.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
@@ -2256,15 +2144,6 @@ dependencies = [
 
 [[package]]
 name = "pulldown-cmark"
-version = "0.1.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "bitflags 0.9.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "getopts 0.2.19 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "pulldown-cmark"
 version = "0.5.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
@@ -2291,11 +2170,6 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "quote"
-version = "0.3.15"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[[package]]
-name = "quote"
 version = "0.6.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
@@ -2457,18 +2331,6 @@ dependencies = [
 
 [[package]]
 name = "regex"
-version = "0.2.11"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "aho-corasick 0.6.9 (registry+https://github.com/rust-lang/crates.io-index)",
- "memchr 2.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "regex-syntax 0.5.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "thread_local 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "utf8-ranges 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "regex"
 version = "1.1.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
@@ -2481,14 +2343,6 @@ dependencies = [
 
 [[package]]
 name = "regex-syntax"
-version = "0.5.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "ucd-util 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "regex-syntax"
 version = "0.6.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
@@ -2529,7 +2383,7 @@ dependencies = [
  "mime_guess 2.0.0-alpha.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "native-tls 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.92 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.33 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.40 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_urlencoded 0.5.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "tokio 0.1.14 (registry+https://github.com/rust-lang/crates.io-index)",
  "tokio-executor 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -2584,7 +2438,7 @@ dependencies = [
  "serde 1.0.92 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_derive 1.0.81 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_ignored 0.0.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.33 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.40 (registry+https://github.com/rust-lang/crates.io-index)",
  "tempfile 3.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "tokio 0.1.14 (registry+https://github.com/rust-lang/crates.io-index)",
  "tokio-process 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -2607,7 +2461,7 @@ dependencies = [
  "rls-data 0.19.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "rls-span 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.92 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.33 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.40 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -2651,8 +2505,7 @@ version = "0.1.0"
 dependencies = [
  "clap 2.32.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "failure 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "mdbook 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
- "mdbook 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "mdbook 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "mdbook-linkcheck 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -2893,7 +2746,7 @@ dependencies = [
  "rand 0.6.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "scopeguard 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.92 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.33 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.40 (registry+https://github.com/rust-lang/crates.io-index)",
  "smallvec 0.6.10 (registry+https://github.com/rust-lang/crates.io-index)",
  "syn 0.15.35 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -3280,7 +3133,7 @@ dependencies = [
  "rustc_data_structures 0.0.0",
  "rustc_target 0.0.0",
  "rustc_typeck 0.0.0",
- "serde_json 1.0.33 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.40 (registry+https://github.com/rust-lang/crates.io-index)",
  "syntax 0.0.0",
  "syntax_pos 0.0.0",
 ]
@@ -3386,7 +3239,7 @@ dependencies = [
  "log 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.92 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_derive 1.0.81 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.33 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.40 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -3424,7 +3277,7 @@ dependencies = [
  "rustc-workspace-hack 1.0.0",
  "rustfmt-config_proc_macro 0.1.2",
  "serde 1.0.92 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.33 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.40 (registry+https://github.com/rust-lang/crates.io-index)",
  "structopt 0.2.18 (registry+https://github.com/rust-lang/crates.io-index)",
  "term 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "toml 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -3435,7 +3288,7 @@ dependencies = [
 
 [[package]]
 name = "ryu"
-version = "0.2.7"
+version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -3531,11 +3384,11 @@ dependencies = [
 
 [[package]]
 name = "serde_json"
-version = "1.0.33"
+version = "1.0.40"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "itoa 0.4.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "ryu 0.2.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "ryu 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.92 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -3742,16 +3595,6 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "0.11.11"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "quote 0.3.15 (registry+https://github.com/rust-lang/crates.io-index)",
- "synom 0.11.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "unicode-xid 0.0.4 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "syn"
 version = "0.15.35"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
@@ -3761,14 +3604,6 @@ dependencies = [
 ]
 
 [[package]]
-name = "synom"
-version = "0.11.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "unicode-xid 0.0.4 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
 name = "synstructure"
 version = "0.10.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -3944,7 +3779,7 @@ dependencies = [
  "lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "regex 1.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.92 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.33 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.40 (registry+https://github.com/rust-lang/crates.io-index)",
  "walkdir 2.2.7 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -4174,18 +4009,6 @@ dependencies = [
 
 [[package]]
 name = "toml-query"
-version = "0.6.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "error-chain 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "is-match 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "regex 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)",
- "toml 0.4.10 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "toml-query"
 version = "0.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
@@ -4269,11 +4092,6 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "unicode-xid"
-version = "0.0.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[[package]]
-name = "unicode-xid"
 version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
@@ -4474,10 +4292,8 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [metadata]
 "checksum adler32 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)" = "7e522997b529f05601e05166c07ed17789691f562762c7f3b987263d2dedee5c"
-"checksum aho-corasick 0.6.9 (registry+https://github.com/rust-lang/crates.io-index)" = "1e9a933f4e58658d7b12defcf96dc5c720f20832deebe3e0a19efd3b6aaeeb9e"
 "checksum aho-corasick 0.7.3 (registry+https://github.com/rust-lang/crates.io-index)" = "e6f484ae0c99fec2e858eb6134949117399f222608d84cadb3f58c1f97c2364c"
-"checksum ammonia 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "a8b93ecb80665873703bf3b0a77f369c96b183d8e0afaf30a3ff5ff07dfc6409"
-"checksum ammonia 2.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "c799ecf1ad77acb48b643e2f45b12d60ee41576287fc575031aa020de88b8f45"
+"checksum ammonia 2.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "384d704f242a0a9faf793fff775a0be6ab9aa27edabffa097331d73779142520"
 "checksum annotate-snippets 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)" = "e8bcdcd5b291ce85a78f2b9d082a8de9676c12b1840d386d67bc5eea6f9d2b4e"
 "checksum ansi_term 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ee49baf6cb617b853aa8d93bf420db2383fab46d314482ca2803b40d5fde979b"
 "checksum arc-swap 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)" = "1025aeae2b664ca0ea726a89d574fe8f4e77dd712d443236ad1de00379450cf6"
@@ -4489,7 +4305,6 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum backtrace 0.3.29 (registry+https://github.com/rust-lang/crates.io-index)" = "2d631cd7af21b7ff796293f1990104e3cdb606852863bac32f000c193aa35dfb"
 "checksum backtrace-sys 0.1.27 (registry+https://github.com/rust-lang/crates.io-index)" = "6ea90dd7b012b3d1a2cb6bec16670a0db2c95d4e931e84f4047e0460c1b34c8d"
 "checksum base64 0.10.1 (registry+https://github.com/rust-lang/crates.io-index)" = "0b25d992356d2eb0ed82172f5248873db5560c4721f564b13cb5193bda5e668e"
-"checksum bitflags 0.9.1 (registry+https://github.com/rust-lang/crates.io-index)" = "4efd02e230a02e18f92fc2735f44597385ed02ad8f831e7c1c1156ee5e1ab3a5"
 "checksum bitflags 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)" = "228047a76f468627ca71776ecdebd732a3423081fcf5125585bcd7c49886ce12"
 "checksum blake2-rfc 0.2.18 (registry+https://github.com/rust-lang/crates.io-index)" = "5d6d530bdd2d52966a6d03b7a964add7ae1a288d25214066fd4b600f0f796400"
 "checksum block-buffer 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)" = "a076c298b9ecdb530ed9d967e74a6027d6a7478924520acddcddc24c1c8ab3ab"
@@ -4551,7 +4366,6 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum encoding_rs 0.8.17 (registry+https://github.com/rust-lang/crates.io-index)" = "4155785c79f2f6701f185eb2e6b4caf0555ec03477cb4c70db67b465311620ed"
 "checksum env_logger 0.5.13 (registry+https://github.com/rust-lang/crates.io-index)" = "15b0a4d2e39f8420210be8b27eeda28029729e2fd4291019455016c348240c38"
 "checksum env_logger 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)" = "afb070faf94c85d17d50ca44f6ad076bce18ae92f0037d350947240a36e9d42e"
-"checksum error-chain 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ff511d5dc435d703f4971bc399647c9bc38e20cb41452e3b9feb4765419ed3f3"
 "checksum error-chain 0.12.0 (registry+https://github.com/rust-lang/crates.io-index)" = "07e791d3be96241c77c43846b665ef1384606da2cd2a48730abe606a12906e02"
 "checksum failure 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)" = "795bd83d3abeb9220f257e597aa0080a508b27533824adf336529648f6abf7e2"
 "checksum failure_derive 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)" = "ea1063915fd7ef4309e222a5a07cf9c319fb9c7836b1f89b85458672dbb127e1"
@@ -4580,13 +4394,12 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum glob 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "9b919933a397b79c37e33b77bb2aa3dc8eb6e165ad809e58ff75bc7db2e34574"
 "checksum globset 0.4.3 (registry+https://github.com/rust-lang/crates.io-index)" = "ef4feaabe24a0a658fd9cf4a9acf6ed284f045c77df0f49020ba3245cfb7b454"
 "checksum h2 0.1.25 (registry+https://github.com/rust-lang/crates.io-index)" = "a539b63339fbbb00e081e84b6e11bd1d9634a82d91da2984a18ac74a8823f392"
-"checksum handlebars 0.32.4 (registry+https://github.com/rust-lang/crates.io-index)" = "d89ec99d1594f285d4590fc32bac5f75cdab383f1123d504d27862c644a807dd"
-"checksum handlebars 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "d82e5750d8027a97b9640e3fefa66bbaf852a35228e1c90790efd13c4b09c166"
+"checksum handlebars 2.0.1 (registry+https://github.com/rust-lang/crates.io-index)" = "df044dd42cdb7e32f28557b661406fc0f2494be75199779998810dbc35030e0d"
 "checksum hashbrown 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "9529213c67695ca2d146e6f263b7b72df8fa973368beadf767e8ed80c03f2f36"
+"checksum hashbrown 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)" = "e1de41fb8dba9714efd92241565cdff73f78508c95697dd56787d3cba27e2353"
 "checksum heck 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ea04fa3ead4e05e51a7c806fc07271fdbde4e246a6c6d1efd52e72230b771b82"
 "checksum hex 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)" = "805026a5d0141ffc30abb3be3173848ad46a1b1664fe632428479619a3644d77"
 "checksum home 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)" = "80dff82fb58cfbbc617fb9a9184b010be0529201553cda50ad04372bc2333aff"
-"checksum html5ever 0.22.5 (registry+https://github.com/rust-lang/crates.io-index)" = "c213fa6a618dc1da552f54f85cba74b05d8e883c92ec4e89067736938084c26e"
 "checksum html5ever 0.23.0 (registry+https://github.com/rust-lang/crates.io-index)" = "5ce65ac8028cf5a287a7dbf6c4e0a6cf2dcf022ed5b167a81bae66ebf599a8b7"
 "checksum http 0.1.16 (registry+https://github.com/rust-lang/crates.io-index)" = "fe67e3678f2827030e89cc4b9e7ecd16d52f132c0b940ab5005f88e821500f6a"
 "checksum http-body 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "6741c859c1b2463a423a1dbce98d418e6c3c3fc720fb0d45528657320920292d"
@@ -4628,11 +4441,9 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum mac 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "c41e0c4fef86961ac6d6f8a82609f55f31b05e4fce149ac5710e439df7619ba4"
 "checksum macro-utils 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "f2c4deaccc2ead6a28c16c0ba82f07d52b6475397415ce40876e559b0b0ea510"
 "checksum maplit 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)" = "08cbb6b4fef96b6d77bfc40ec491b1690c779e77b05cd9f07f787ed376fd4c43"
-"checksum markup5ever 0.7.5 (registry+https://github.com/rust-lang/crates.io-index)" = "897636f9850c3eef4905a5540683ed53dc9393860f0846cab2c2ddf9939862ff"
 "checksum markup5ever 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)" = "f1af46a727284117e09780d05038b1ce6fc9c76cc6df183c3dae5a8955a25e21"
 "checksum matches 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)" = "7ffc5c5338469d4d3ea17d269fa8ea3512ad247247c30bd2df69e68309ed0a08"
-"checksum mdbook 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)" = "90b5a8d7e341ceee5db3882a06078d42661ddcfa2b3687319cc5da76ec4e782f"
-"checksum mdbook 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "0c8e2c6442721202fb3b5800741aaafcc7076cdd199b326f0a39ce52a042cd37"
+"checksum mdbook 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)" = "949bb2acb2cff9fa5c375cf9c43e70b3dba0a974d9fe01c31285d7a84d2a0fa2"
 "checksum mdbook-linkcheck 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "77d1f0ba4d1e6b86fa18e8853d026d7d76a97eb7eb5eb052ed80901e43b7fc10"
 "checksum measureme 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "d09de7dafa3aa334bc806447c7e4de69419723312f4b88b80b561dea66601ce8"
 "checksum memchr 2.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "2efc7bc57c883d4a4d6e3246905283d8dae951bb3bd32f49d6ef297f546e1c39"
@@ -4670,9 +4481,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum parking_lot 0.7.1 (registry+https://github.com/rust-lang/crates.io-index)" = "ab41b4aed082705d1056416ae4468b6ea99d52599ecf3169b00088d43113e337"
 "checksum parking_lot_core 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "94c8c7923936b28d546dfd14d4472eaf34c99b14e1c973a32b3e6d4eb04298c9"
 "checksum percent-encoding 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)" = "31010dd2e1ac33d5b46a5b413495239882813e0369f8ed8a5e266f173602f831"
-"checksum pest 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)" = "0fce5d8b5cc33983fc74f78ad552b5522ab41442c4ca91606e4236eb4b5ceefc"
 "checksum pest 2.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "54f0c72a98d8ab3c99560bfd16df8059cc10e1f9a8e83e6e3b97718dd766e9c3"
-"checksum pest_derive 1.0.8 (registry+https://github.com/rust-lang/crates.io-index)" = "ca3294f437119209b084c797604295f40227cffa35c57220b1e99a6ff3bf8ee4"
 "checksum pest_derive 2.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "833d1ae558dc601e9a60366421196a8d94bc0ac980476d0b67e1d0988d72b2d0"
 "checksum pest_generator 2.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "63120576c4efd69615b5537d3d052257328a4ca82876771d6944424ccfd9f646"
 "checksum pest_meta 2.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "f5a3492a4ed208ffc247adcdcc7ba2a95be3104f58877d0d02f0df39bf3efb5e"
@@ -4687,12 +4496,10 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum pretty_assertions 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)" = "3a029430f0d744bc3d15dd474d591bed2402b645d024583082b9f63bb936dac6"
 "checksum pretty_env_logger 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "df8b3f4e0475def7d9c2e5de8e5a1306949849761e107b360d03e98eafaffd61"
 "checksum proc-macro2 0.4.30 (registry+https://github.com/rust-lang/crates.io-index)" = "cf3d2011ab5c909338f7887f4fc896d35932e29146c12c8d01da6b22a80ba759"
-"checksum pulldown-cmark 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "d6fdf85cda6cadfae5428a54661d431330b312bc767ddbc57adbedc24da66e32"
 "checksum pulldown-cmark 0.5.2 (registry+https://github.com/rust-lang/crates.io-index)" = "051e60ace841b3bfecd402fe5051c06cb3bec4a6e6fdd060a37aa8eb829a1db3"
 "checksum punycode 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "6ddd112cca70a4d30883b2d21568a1d376ff8be4758649f64f973c6845128ad3"
 "checksum quick-error 1.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "9274b940887ce9addde99c4eee6b5c44cc494b182b97e73dc8ffdcb3397fd3f0"
 "checksum quine-mc_cluskey 0.2.4 (registry+https://github.com/rust-lang/crates.io-index)" = "07589615d719a60c8dd8a4622e7946465dfef20d1a428f969e3443e7386d5f45"
-"checksum quote 0.3.15 (registry+https://github.com/rust-lang/crates.io-index)" = "7a6e920b65c65f10b2ae65c831a81a073a89edd28c7cce89475bff467ab4167a"
 "checksum quote 0.6.12 (registry+https://github.com/rust-lang/crates.io-index)" = "faf4799c5d274f3868a4aae320a0a182cbd2baee377b378f080e16a23e9d80db"
 "checksum racer 2.1.23 (registry+https://github.com/rust-lang/crates.io-index)" = "94dbdea3d959d8f76a2e303b3eadf107fd76da886b231291e649168613d432fb"
 "checksum rand 0.6.1 (registry+https://github.com/rust-lang/crates.io-index)" = "ae9d223d52ae411a33cf7e54ec6034ec165df296ccd23533d671a28252b6f66a"
@@ -4710,9 +4517,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum redox_syscall 0.1.43 (registry+https://github.com/rust-lang/crates.io-index)" = "679da7508e9a6390aeaf7fbd02a800fdc64b73fe2204dd2c8ae66d22d9d5ad5d"
 "checksum redox_termios 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "7e891cfe48e9100a70a3b6eb652fef28920c117d366339687bd5576160db0f76"
 "checksum redox_users 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "3fe5204c3a17e97dde73f285d49be585df59ed84b50a872baf416e73b62c3828"
-"checksum regex 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)" = "9329abc99e39129fcceabd24cf5d85b4671ef7c29c50e972bc5afe32438ec384"
 "checksum regex 1.1.6 (registry+https://github.com/rust-lang/crates.io-index)" = "8f0a0bcab2fd7d1d7c54fa9eae6f43eddeb9ce2e7352f8518a814a4f65d60c58"
-"checksum regex-syntax 0.5.6 (registry+https://github.com/rust-lang/crates.io-index)" = "7d707a4fa2637f2dca2ef9fd02225ec7661fe01a53623c1e6515b6916511f7a7"
 "checksum regex-syntax 0.6.6 (registry+https://github.com/rust-lang/crates.io-index)" = "dcfd8681eebe297b81d98498869d4aae052137651ad7b96822f09ceb690d0a96"
 "checksum remove_dir_all 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)" = "3488ba1b9a2084d38645c4c08276a1752dcbf2c7130d74f1569681ad5d2799c5"
 "checksum reqwest 0.9.11 (registry+https://github.com/rust-lang/crates.io-index)" = "e542d9f077c126af32536b6aacc75bb7325400eab8cd0743543be5d91660780d"
@@ -4740,7 +4545,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum rustc_tools_util 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "b725dadae9fabc488df69a287f5a99c5eaf5d10853842a8a3dfac52476f544ee"
 "checksum rustc_version 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)" = "138e3e0acb6c9fb258b19b67cb8abd63c00679d2851805ea151465464fe9030a"
 "checksum rustfix 0.4.4 (registry+https://github.com/rust-lang/crates.io-index)" = "af7c21531a91512a4a51b490be6ba1c8eff34fdda0dc5bf87dc28d86748aac56"
-"checksum ryu 0.2.7 (registry+https://github.com/rust-lang/crates.io-index)" = "eb9e9b8cde282a9fe6a42dd4681319bfb63f121b8a8ee9439c6f4107e58a46f7"
+"checksum ryu 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "c92464b447c0ee8c4fb3824ecc8383b81717b9f1e74ba2e72540aef7b9f82997"
 "checksum same-file 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)" = "8f20c4be53a8a1ff4c1f1b2bd14570d2f634628709752f0702ecdd2b3f9a5267"
 "checksum schannel 0.1.14 (registry+https://github.com/rust-lang/crates.io-index)" = "0e1a231dc10abf6749cfa5d7767f25888d484201accbd919b66ab5413c502d56"
 "checksum scoped-tls 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ea6a9290e3c9cf0f18145ef7ffa62d68ee0bf5fcd651017e586dc7fd5da448c2"
@@ -4753,7 +4558,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum serde 1.0.92 (registry+https://github.com/rust-lang/crates.io-index)" = "32746bf0f26eab52f06af0d0aa1984f641341d06d8d673c693871da2d188c9be"
 "checksum serde_derive 1.0.81 (registry+https://github.com/rust-lang/crates.io-index)" = "477b13b646f5b5b56fc95bedfc3b550d12141ce84f466f6c44b9a17589923885"
 "checksum serde_ignored 0.0.4 (registry+https://github.com/rust-lang/crates.io-index)" = "190e9765dcedb56be63b6e0993a006c7e3b071a016a304736e4a315dc01fb142"
-"checksum serde_json 1.0.33 (registry+https://github.com/rust-lang/crates.io-index)" = "c37ccd6be3ed1fdf419ee848f7c758eb31b054d7cd3ae3600e3bae0adf569811"
+"checksum serde_json 1.0.40 (registry+https://github.com/rust-lang/crates.io-index)" = "051c49229f282f7c6f3813f8286cc1e3323e8051823fce42c7ea80fe13521704"
 "checksum serde_urlencoded 0.5.5 (registry+https://github.com/rust-lang/crates.io-index)" = "642dd69105886af2efd227f75a520ec9b44a820d65bc133a9131f7d229fd165a"
 "checksum sha-1 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)" = "51b9d1f3b5de8a167ab06834a7c883bd197f2191e1dda1a22d9ccfeedbf9aded"
 "checksum shell-escape 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)" = "170a13e64f2a51b77a45702ba77287f5c6829375b04a69cf2222acd17d0cfab9"
@@ -4775,9 +4580,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum structopt-derive 0.2.18 (registry+https://github.com/rust-lang/crates.io-index)" = "53010261a84b37689f9ed7d395165029f9cc7abb9f56bbfe86bee2597ed25107"
 "checksum strum 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)" = "f6c3a2071519ab6a48f465808c4c1ffdd00dfc8e93111d02b4fc5abab177676e"
 "checksum strum_macros 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)" = "8baacebd7b7c9b864d83a6ba7a246232983e277b86fa5cdec77f565715a4b136"
-"checksum syn 0.11.11 (registry+https://github.com/rust-lang/crates.io-index)" = "d3b891b9015c88c576343b9b3e41c2c11a51c219ef067b264bd9c8aa9b441dad"
 "checksum syn 0.15.35 (registry+https://github.com/rust-lang/crates.io-index)" = "641e117d55514d6d918490e47102f7e08d096fdde360247e4a10f7a91a8478d3"
-"checksum synom 0.11.3 (registry+https://github.com/rust-lang/crates.io-index)" = "a393066ed9010ebaed60b9eafa373d4b1baac186dd7e008555b0f702b51945b6"
 "checksum synstructure 0.10.2 (registry+https://github.com/rust-lang/crates.io-index)" = "02353edf96d6e4dc81aea2d8490a7e9db177bf8acb0e951c24940bf866cb313f"
 "checksum take_mut 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "f764005d11ee5f36500a149ace24e00e3da98b0158b3e2d53a7495660d3f4d60"
 "checksum tar 0.4.20 (registry+https://github.com/rust-lang/crates.io-index)" = "a303ba60a099fcd2aaa646b14d2724591a96a75283e4b7ed3d1a1658909d9ae2"
@@ -4808,7 +4611,6 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum tokio-uds 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)" = "037ffc3ba0e12a0ab4aca92e5234e0dedeb48fddf6ccd260f1f150a36a9f2445"
 "checksum toml 0.4.10 (registry+https://github.com/rust-lang/crates.io-index)" = "758664fc71a3a69038656bee8b6be6477d2a6c315a6b81f7081f591bffa4111f"
 "checksum toml 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)" = "b8c96d7873fa7ef8bdeb3a9cda3ac48389b4154f32b9803b4bc26220b677b039"
-"checksum toml-query 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)" = "6854664bfc6df0360c695480836ee90e2d0c965f06db291d10be9344792d43e8"
 "checksum toml-query 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)" = "a24369a1894ac8224efcfd567c3d141aea360292f49888e7ec7dcc316527aebb"
 "checksum toml-query_derive 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)" = "3c99ca245ec273c7e75c8ee58f47b882d0146f3c2c8495158082c6671e8b5335"
 "checksum try-lock 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "e604eb7b43c06650e854be16a2a03155743d3752dd1c943f6829e26b7a36e382"
@@ -4821,7 +4623,6 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum unicode-normalization 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)" = "6a0180bc61fc5a987082bfa111f4cc95c4caff7f9799f3e46df09163a937aa25"
 "checksum unicode-segmentation 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "aa6024fc12ddfd1c6dbc14a80fa2324d4568849869b779f6bd37e5e4c03344d1"
 "checksum unicode-width 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)" = "882386231c45df4700b275c7ff55b6f3698780a650026380e72dabe76fa46526"
-"checksum unicode-xid 0.0.4 (registry+https://github.com/rust-lang/crates.io-index)" = "8c1f860d7d29cf02cb2f3f359fd35991af3d30bac52c57d265a3c461074cb4dc"
 "checksum unicode-xid 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "fc72304796d0818e357ead4e000d19c9c174ab23dc11093ac919054d20a6a7fc"
 "checksum unicode_categories 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "39ec24b3121d976906ece63c9daad25b85969647682eee313cb5779fdd69e14e"
 "checksum url 1.7.2 (registry+https://github.com/rust-lang/crates.io-index)" = "dd4e7c0d531266369519a4aa4f399d748bd37043b00bde1e4ff1f60a120b355a"
diff --git a/src/bootstrap/doc.rs b/src/bootstrap/doc.rs
index 2969bbf5b00..36229720e42 100644
--- a/src/bootstrap/doc.rs
+++ b/src/bootstrap/doc.rs
@@ -23,7 +23,7 @@ use crate::cache::{INTERNER, Interned};
 use crate::config::Config;
 
 macro_rules! book {
-    ($($name:ident, $path:expr, $book_name:expr, $book_ver:expr;)+) => {
+    ($($name:ident, $path:expr, $book_name:expr;)+) => {
         $(
             #[derive(Debug, Copy, Clone, Hash, PartialEq, Eq)]
         pub struct $name {
@@ -49,7 +49,6 @@ macro_rules! book {
                 builder.ensure(RustbookSrc {
                     target: self.target,
                     name: INTERNER.intern_str($book_name),
-                    version: $book_ver,
                     src: doc_src(builder),
                 })
             }
@@ -61,21 +60,15 @@ macro_rules! book {
 // NOTE: When adding a book here, make sure to ALSO build the book by
 // adding a build step in `src/bootstrap/builder.rs`!
 book!(
-    EditionGuide, "src/doc/edition-guide", "edition-guide", RustbookVersion::Latest;
-    EmbeddedBook, "src/doc/embedded-book", "embedded-book", RustbookVersion::Latest;
-    Nomicon, "src/doc/nomicon", "nomicon", RustbookVersion::Latest;
-    Reference, "src/doc/reference", "reference", RustbookVersion::MdBook1;
-    RustByExample, "src/doc/rust-by-example", "rust-by-example", RustbookVersion::Latest;
-    RustcBook, "src/doc/rustc", "rustc", RustbookVersion::MdBook1;
-    RustdocBook, "src/doc/rustdoc", "rustdoc", RustbookVersion::Latest;
+    EditionGuide, "src/doc/edition-guide", "edition-guide";
+    EmbeddedBook, "src/doc/embedded-book", "embedded-book";
+    Nomicon, "src/doc/nomicon", "nomicon";
+    Reference, "src/doc/reference", "reference";
+    RustByExample, "src/doc/rust-by-example", "rust-by-example";
+    RustcBook, "src/doc/rustc", "rustc";
+    RustdocBook, "src/doc/rustdoc", "rustdoc";
 );
 
-#[derive(Debug, Copy, Clone, Hash, PartialEq, Eq)]
-enum RustbookVersion {
-    MdBook1,
-    Latest,
-}
-
 fn doc_src(builder: &Builder<'_>) -> Interned<PathBuf> {
     INTERNER.intern_path(builder.src.join("src/doc"))
 }
@@ -108,7 +101,6 @@ impl Step for UnstableBook {
             target: self.target,
             name: INTERNER.intern_str("unstable-book"),
             src: builder.md_doc_out(self.target),
-            version: RustbookVersion::Latest,
         })
     }
 }
@@ -162,7 +154,6 @@ struct RustbookSrc {
     target: Interned<String>,
     name: Interned<String>,
     src: Interned<PathBuf>,
-    version: RustbookVersion,
 }
 
 impl Step for RustbookSrc {
@@ -194,18 +185,11 @@ impl Step for RustbookSrc {
         builder.info(&format!("Rustbook ({}) - {}", target, name));
         let _ = fs::remove_dir_all(&out);
 
-        let vers = match self.version {
-            RustbookVersion::MdBook1 => "1",
-            RustbookVersion::Latest => "3",
-        };
-
         builder.run(rustbook_cmd
                        .arg("build")
                        .arg(&src)
                        .arg("-d")
-                       .arg(out)
-                       .arg("-m")
-                       .arg(vers));
+                       .arg(out));
     }
 }
 
@@ -251,7 +235,6 @@ impl Step for TheBook {
         builder.ensure(RustbookSrc {
             target,
             name: INTERNER.intern_string(name.to_string()),
-            version: RustbookVersion::Latest,
             src: doc_src(builder),
         });
 
@@ -261,7 +244,6 @@ impl Step for TheBook {
         builder.ensure(RustbookSrc {
             target,
             name: INTERNER.intern_string(source_name),
-            version: RustbookVersion::Latest,
             src: doc_src(builder),
         });
 
@@ -269,7 +251,6 @@ impl Step for TheBook {
         builder.ensure(RustbookSrc {
             target,
             name: INTERNER.intern_string(source_name),
-            version: RustbookVersion::Latest,
             src: doc_src(builder),
         });
 
@@ -277,7 +258,6 @@ impl Step for TheBook {
         builder.ensure(RustbookSrc {
             target,
             name: INTERNER.intern_string(source_name),
-            version: RustbookVersion::Latest,
             src: doc_src(builder),
         });
 
diff --git a/src/doc/book b/src/doc/book
-Subproject 6c0d83499c8e77e06a71d28c5e1adccec278d4f
+Subproject 7ddc46460f09a5cd9bd2a620565bdc20b3315ea
diff --git a/src/doc/edition-guide b/src/doc/edition-guide
-Subproject f8072acde5ce29c7570d7986180bbded2d22e28
+Subproject f6c8b92d4e63edd28e862be952f33861f35956f
diff --git a/src/doc/embedded-book b/src/doc/embedded-book
-Subproject ef27b517dcd0b990c888c0d7caeff52a5a11561
+Subproject ff334e74fdb9f197e621efa6d7c3105be892e88
diff --git a/src/doc/nomicon b/src/doc/nomicon
-Subproject 341c221116a8b9f1010cf1eece952b80c5ec7f5
+Subproject b7f0aba2f88a8feade70595efcfa3438e54e96c
diff --git a/src/doc/reference b/src/doc/reference
-Subproject 7a5aab5fd50d6290679beb4cf42fa5f46ed22ae
+Subproject 8e7d614303b0dec7492e048e63855fcd3b944ec
diff --git a/src/doc/rust-by-example b/src/doc/rust-by-example
-Subproject 62b3ff2cb44dd8b648c3ef2a9347c3706d14801
+Subproject e3679e214d8db44586aca9b20aa27517007d192
diff --git a/src/doc/rustc/src/codegen-options/index.md b/src/doc/rustc/src/codegen-options/index.md
index 3773a778302..5c41acc6581 100644
--- a/src/doc/rustc/src/codegen-options/index.md
+++ b/src/doc/rustc/src/codegen-options/index.md
@@ -221,13 +221,13 @@ This flag allows for creating instrumented binaries that will collect
 profiling data for use with profile-guided optimization (PGO). The flag takes
 an optional argument which is the path to a directory into which the
 instrumented binary will emit the collected data. See the chapter on
-[profile-guided optimization](profile-guided-optimization.html) for more
-information.
+[profile-guided optimization] for more information.
 
 ## profile-use
 
 This flag specifies the profiling data file to be used for profile-guided
 optimization (PGO). The flag takes a mandatory argument which is the path
 to a valid `.profdata` file. See the chapter on
-[profile-guided optimization](profile-guided-optimization.html) for more
-information.
+[profile-guided optimization] for more information.
+
+[profile-guided optimization]: ../profile-guided-optimization.md
diff --git a/src/doc/rustc/src/command-line-arguments.md b/src/doc/rustc/src/command-line-arguments.md
index bd7f6630ea2..3af2a51ce5e 100644
--- a/src/doc/rustc/src/command-line-arguments.md
+++ b/src/doc/rustc/src/command-line-arguments.md
@@ -161,11 +161,11 @@ of print values are:
 
 ## `-g`: include debug information
 
-A synonym for `-C debuginfo=2`, for more see [here](codegen-options/index.html#debuginfo).
+A synonym for `-C debuginfo=2`, for more see [here](codegen-options/index.md#debuginfo).
 
 ## `-O`: optimize your code
 
-A synonym for `-C opt-level=2`, for more see [here](codegen-options/index.html#opt-level).
+A synonym for `-C opt-level=2`, for more see [here](codegen-options/index.md#opt-level).
 
 ## `-o`: filename of the output
 
@@ -188,23 +188,23 @@ and instead produce a test harness.
 
 ## `--target`: select a target triple to build
 
-This controls which [target](targets/index.html) to produce.
+This controls which [target](targets/index.md) to produce.
 
 ## `-W`: set lint warnings
 
-This flag will set which lints should be set to the [warn level](lints/levels.html#warn).
+This flag will set which lints should be set to the [warn level](lints/levels.md#warn).
 
 ## `-A`: set lint allowed
 
-This flag will set which lints should be set to the [allow level](lints/levels.html#allow).
+This flag will set which lints should be set to the [allow level](lints/levels.md#allow).
 
 ## `-D`: set lint denied
 
-This flag will set which lints should be set to the [deny level](lints/levels.html#deny).
+This flag will set which lints should be set to the [deny level](lints/levels.md#deny).
 
 ## `-F`: set lint forbidden
 
-This flag will set which lints should be set to the [forbid level](lints/levels.html#forbid).
+This flag will set which lints should be set to the [forbid level](lints/levels.md#forbid).
 
 ## `-Z`: set unstable options
 
@@ -215,11 +215,11 @@ run: `rustc -Z help`.
 
 ## `--cap-lints`: set the most restrictive lint level
 
-This flag lets you 'cap' lints, for more, [see here](lints/levels.html#capping-lints).
+This flag lets you 'cap' lints, for more, [see here](lints/levels.md#capping-lints).
 
 ## `-C`/`--codegen`: code generation options
 
-This flag will allow you to set [codegen options](codegen-options/index.html).
+This flag will allow you to set [codegen options](codegen-options/index.md).
 
 ## `-V`/`--version`: print a version
 
diff --git a/src/tools/cargo b/src/tools/cargo
-Subproject 677a180f4c8ca1dcef594f68dd0e63e4f08621f
+Subproject e3563dbdcd2e370bc4f11d080f739d82d25773f
diff --git a/src/tools/rustbook/Cargo.toml b/src/tools/rustbook/Cargo.toml
index 15a71df93a2..bb10d06851b 100644
--- a/src/tools/rustbook/Cargo.toml
+++ b/src/tools/rustbook/Cargo.toml
@@ -14,11 +14,5 @@ version = "0.3.0"
 default-features = false
 features = ["search"]
 
-[dependencies.mdbook_1]
-package = "mdbook"
-version = "0.1.7"
-default-features = false
-features = ["search"]
-
 [target.'cfg(all(target_arch = "x86_64", target_os = "linux"))'.dependencies]
 mdbook-linkcheck = "0.3.0"
diff --git a/src/tools/rustbook/src/main.rs b/src/tools/rustbook/src/main.rs
index c9e240049a1..4689bee3e13 100644
--- a/src/tools/rustbook/src/main.rs
+++ b/src/tools/rustbook/src/main.rs
@@ -7,9 +7,6 @@ use std::path::{Path, PathBuf};
 
 use clap::{App, ArgMatches, SubCommand, AppSettings};
 
-use mdbook_1::{MDBook as MDBook1};
-use mdbook_1::errors::{Result as Result1};
-
 use mdbook::MDBook;
 use mdbook::errors::{Result as Result3};
 
@@ -25,8 +22,6 @@ fn main() {
 'The output directory for your book{n}(Defaults to ./book when omitted)'";
     let dir_message = "[dir]
 'A directory for your book{n}(Defaults to Current Directory when omitted)'";
-    let vers_message = "-m, --mdbook-vers=[md-version]
-'The version of mdbook to use for your book{n}(Defaults to 1 when omitted)'";
 
     let matches = App::new("rustbook")
                     .about("Build a book with mdBook")
@@ -36,8 +31,7 @@ fn main() {
                     .subcommand(SubCommand::with_name("build")
                         .about("Build the book from the markdown files")
                         .arg_from_usage(d_message)
-                        .arg_from_usage(dir_message)
-                        .arg_from_usage(vers_message))
+                        .arg_from_usage(dir_message))
                     .subcommand(SubCommand::with_name("linkcheck")
                         .about("Run linkcheck with mdBook 3")
                         .arg_from_usage(dir_message))
@@ -46,33 +40,15 @@ fn main() {
     // Check which subcomamnd the user ran...
     match matches.subcommand() {
         ("build", Some(sub_matches)) => {
-            match sub_matches.value_of("mdbook-vers") {
-                None | Some("1") => {
-                    if let Err(e) = build_1(sub_matches) {
-                        eprintln!("Error: {}", e);
-
-                        for cause in e.iter().skip(1) {
-                            eprintln!("\tCaused By: {}", cause);
-                        }
+            if let Err(e) = build(sub_matches) {
+                eprintln!("Error: {}", e);
 
-                        ::std::process::exit(101);
-                    }
+                for cause in e.iter().skip(1) {
+                    eprintln!("\tCaused By: {}", cause);
                 }
-                Some("2") | Some("3") => {
-                    if let Err(e) = build(sub_matches) {
-                        eprintln!("Error: {}", e);
 
-                        for cause in e.iter().skip(1) {
-                            eprintln!("\tCaused By: {}", cause);
-                        }
-
-                        ::std::process::exit(101);
-                    }
-                }
-                _ => {
-                    panic!("Invalid mdBook version! Select '1' or '2' or '3'");
-                }
-            };
+                ::std::process::exit(101);
+            }
         },
         ("linkcheck", Some(sub_matches)) => {
             if let Err(err) = linkcheck(sub_matches) {
@@ -111,23 +87,6 @@ pub fn linkcheck(_args: &ArgMatches<'_>) -> Result<(), Error> {
 }
 
 // Build command implementation
-pub fn build_1(args: &ArgMatches<'_>) -> Result1<()> {
-    let book_dir = get_book_dir(args);
-    let mut book = MDBook1::load(&book_dir)?;
-
-    // Set this to allow us to catch bugs in advance.
-    book.config.build.create_missing = false;
-
-    if let Some(dest_dir) = args.value_of("dest-dir") {
-        book.config.build.build_dir = PathBuf::from(dest_dir);
-    }
-
-    book.build()?;
-
-    Ok(())
-}
-
-// Build command implementation
 pub fn build(args: &ArgMatches<'_>) -> Result3<()> {
     let book_dir = get_book_dir(args);
     let mut book = MDBook::load(&book_dir)?;