Book: Restructure Dev chapter

Group everything that has something to do with Clippy development under
the "Development" chapter, so that Clippy users can't get confused.

10 files changed, 9 insertions, 8 deletions

diff --git a/book/src/SUMMARY.md b/book/src/SUMMARY.md
index 95bdde7281c..16e9bea1bdc 100644
--- a/book/src/SUMMARY.md
+++ b/book/src/SUMMARY.md
@@ -13,11 +13,11 @@
     - [Basics](development/basics.md)
     - [Adding Lints](development/adding_lints.md)
     - [Common Tools](development/common_tools_writing_lints.md)
-- [Infrastructure](infrastructure/README.md)
-    - [Syncing changes between Clippy and rust-lang/rust](infrastructure/sync.md)
-    - [Backporting Changes](infrastructure/backport.md)
-    - [Updating the Changelog](infrastructure/changelog_update.md)
-    - [Release a New Version](infrastructure/release.md)
-    - [The Clippy Book](infrastructure/book.md)
-- [Roadmap](roadmap/README.md)
-    - [2021](roadmap/2021.md)
+    - [Infrastructure](development/infrastructure/README.md)
+        - [Syncing changes between Clippy and rust-lang/rust](development/infrastructure/sync.md)
+        - [Backporting Changes](development/infrastructure/backport.md)
+        - [Updating the Changelog](development/infrastructure/changelog_update.md)
+        - [Release a New Version](development/infrastructure/release.md)
+        - [The Clippy Book](development/infrastructure/book.md)
+    - [Proposals](development/proposals/README.md)
+        - [Roadmap 2021](development/proposals/roadmap-2021.md)
diff --git a/book/src/infrastructure/README.md b/book/src/development/infrastructure/README.md
index 2b4e5f6a6ef..2b4e5f6a6ef 100644
--- a/book/src/infrastructure/README.md
+++ b/book/src/development/infrastructure/README.md
diff --git a/book/src/infrastructure/backport.md b/book/src/development/infrastructure/backport.md
index 15f3d1f0806..15f3d1f0806 100644
--- a/book/src/infrastructure/backport.md
+++ b/book/src/development/infrastructure/backport.md
diff --git a/book/src/infrastructure/book.md b/book/src/development/infrastructure/book.md
index b62314c6735..b62314c6735 100644
--- a/book/src/infrastructure/book.md
+++ b/book/src/development/infrastructure/book.md
diff --git a/book/src/infrastructure/changelog_update.md b/book/src/development/infrastructure/changelog_update.md
index e560f4c6a3e..e560f4c6a3e 100644
--- a/book/src/infrastructure/changelog_update.md
+++ b/book/src/development/infrastructure/changelog_update.md
diff --git a/book/src/infrastructure/release.md b/book/src/development/infrastructure/release.md
index 7c2fd29b5f9..7c2fd29b5f9 100644
--- a/book/src/infrastructure/release.md
+++ b/book/src/development/infrastructure/release.md
diff --git a/book/src/infrastructure/sync.md b/book/src/development/infrastructure/sync.md
index 981e63cfdda..981e63cfdda 100644
--- a/book/src/infrastructure/sync.md
+++ b/book/src/development/infrastructure/sync.md
diff --git a/book/src/development/proposals/README.md b/book/src/development/proposals/README.md
new file mode 100644
index 00000000000..2195a7f4832
--- /dev/null
+++ b/book/src/development/proposals/README.md
@@ -0,0 +1 @@
+# Proposals
diff --git a/book/src/roadmap/2021.md b/book/src/development/proposals/roadmap-2021.md
index fe8b080f56f..fe8b080f56f 100644
--- a/book/src/roadmap/2021.md
+++ b/book/src/development/proposals/roadmap-2021.md
diff --git a/book/src/roadmap/README.md b/book/src/roadmap/README.md
deleted file mode 100644
index e69de29bb2d..00000000000
--- a/book/src/roadmap/README.md
+++ /dev/null