Refactor to keep rand version 0.3.0

changed paragraphs with discussion of Cargo.lock file to agree with rand version 0.3.0 in the Cargo.tom file.

1 files changed, 15 insertions, 17 deletions

diff --git a/src/doc/trpl/guessing-game.md b/src/doc/trpl/guessing-game.md
index 6f8798adaca..1e35dd6e818 100644
--- a/src/doc/trpl/guessing-game.md
+++ b/src/doc/trpl/guessing-game.md
@@ -352,17 +352,16 @@ add these few lines at the bottom:
 ```toml
 [dependencies]
 
-rand="*"
+rand="0.3.0"
 ```
 
 The `[dependencies]` section of `Cargo.toml` is like the `[package]` section:
 everything that follows it is part of it, until the next section starts.
 Cargo uses the dependencies section to know what dependencies on external
-crates you have, and what versions you require. In this case, we’ve used `*`,
-which means that we’ll use the latest version of `rand`. Cargo understands
-[Semantic Versioning][semver], which is a standard for writing version
-numbers. If we wanted a specific version or range of versions, we could be
-more specific here. [Cargo’s documentation][cargodoc] contains more details.
+crates you have, and what versions you require. In this case, we’ve used version `0.3.0`.
+Cargo understands [Semantic Versioning][semver], which is a standard for writing version
+numbers. If we wanted to use the latest version we could use `*` or we could use a range 
+of versions. [Cargo’s documentation][cargodoc] contains more details.
 
 [semver]: http://semver.org
 [cargodoc]: http://doc.crates.io/crates-io.html
@@ -372,15 +371,13 @@ Now, without changing any of our code, let’s build our project:
 ```bash
 $ cargo build
     Updating registry `https://github.com/rust-lang/crates.io-index`
- Downloading rand v0.3.8
+ Downloading rand v0.3.0
  Downloading libc v0.1.6
    Compiling libc v0.1.6
-   Compiling rand v0.3.8
+   Compiling rand v0.3.0
    Compiling guessing_game v0.1.0 (file:///home/you/projects/guessing_game)
 ```
 
-(You may see different versions, of course.)
-
 Lots of new output! Now that we have an external dependency, Cargo fetches the
 latest versions of everything from the registry, which is a copy of data from
 [Crates.io][cratesio]. Crates.io is where people in the Rust ecosystem
@@ -410,11 +407,11 @@ $ cargo build
    Compiling guessing_game v0.1.0 (file:///home/you/projects/guessing_game)
 ```
 
-So, we told Cargo we wanted any version of `rand`, and so it fetched the latest
-version at the time this was written, `v0.3.8`. But what happens when next
-week, version `v0.3.9` comes out, with an important bugfix? While getting
-bugfixes is important, what if `0.3.9` contains a regression that breaks our
-code?
+Let's pretend that we told Cargo we wanted the latest version of `rand` (using `*`) 
+for a bit. It would have fetched `v0.3.8` (at the time this was written). 
+But what happens when next week, version `v0.3.9` comes out, with an important 
+bugfix? While getting bugfixes is important, what if `0.3.9` contains a regression 
+that breaks our code?
 
 The answer to this problem is the `Cargo.lock` file you’ll now find in your
 project directory. When you build your project for the first time, Cargo
@@ -422,7 +419,7 @@ figures out all of the versions that fit your criteria, and then writes them
 to the `Cargo.lock` file. When you build your project in the future, Cargo
 will see that the `Cargo.lock` file exists, and then use that specific version
 rather than do all the work of figuring out versions again. This lets you
-have a repeatable build automatically. In other words, we’ll stay at `0.3.8`
+have a repeatable build automatically. In other words, we’ll stay at `0.3.0`
 until we explicitly upgrade, and so will anyone who we share our code with,
 thanks to the lock file.
 
@@ -442,7 +439,8 @@ projects which are assembled out of a number of sub-packages.
 [doccargo]: http://doc.crates.io
 [doccratesio]: http://doc.crates.io/crates-io.html
 
-Let’s get on to actually _using_ `rand`. Here’s our next step:
+Let’s get on to actually _using_ `rand`. Keep the version as `0.3.0` for this 
+project. Here’s our next step:
 
 ```rust,ignore
 extern crate rand;