Auto merge of #23200 - Manishearth:rollup, r=Manishearth

Author: bors

src/doc/grammar.md

@@ -514,7 +514,7 @@ field_expr : expr '.' ident ;
 ### Array expressions
 
 ```antlr
-array_expr : '[' "mut" ? vec_elems? ']' ;
+array_expr : '[' "mut" ? array_elems? ']' ;
 
 array_elems : [expr [',' expr]*] | [expr ',' ".." expr] ;
 ```

src/doc/reference.md

@@ -2847,7 +2847,7 @@ automatically dereferenced to make the field access possible.
 ### Array expressions
 
 ```{.ebnf .gram}
-array_expr : '[' "mut" ? vec_elems? ']' ;
+array_expr : '[' "mut" ? array_elems? ']' ;
 
 array_elems : [expr [',' expr]*] | [expr ';' expr] ;
 ```

src/doc/trpl/SUMMARY.md

@@ -16,11 +16,11 @@
     * [Standard Input](standard-input.md)
     * [Guessing Game](guessing-game.md)
 * [II: Intermediate Rust](intermediate.md)
-    * [More Strings](more-strings.md)
     * [Crates and Modules](crates-and-modules.md)
     * [Testing](testing.md)
     * [Pointers](pointers.md)
     * [Ownership](ownership.md)
+    * [More Strings](more-strings.md)
     * [Patterns](patterns.md)
     * [Method Syntax](method-syntax.md)
     * [Closures](closures.md)

src/doc/trpl/concurrency.md

@@ -223,15 +223,8 @@ method which has this signature:
 fn lock(&self) -> LockResult<MutexGuard<T>>
 ```
 
-If we [look at the code for MutexGuard](https://github.com/rust-lang/rust/blob/ca4b9674c26c1de07a2042cb68e6a062d7184cef/src/libstd/sync/mutex.rs#L172), we'll see
-this:
-
-```ignore
-__marker: marker::NoSend,
-```
-
-Because our guard is `NoSend`, it's not `Send`. Which means we can't actually
-transfer the guard across thread boundaries, which gives us our error.
+Because `Send` is not implemented for `MutexGuard<T>`, we can't transfer the
+guard across thread boundaries, which gives us our error.
 
 We can use `Arc<T>` to fix this. Here's the working version:
 

src/doc/trpl/method-syntax.md

@@ -50,7 +50,29 @@ You can think of this first parameter as being the `x` in `x.foo()`. The three
 variants correspond to the three kinds of thing `x` could be: `self` if it's
 just a value on the stack, `&self` if it's a reference, and `&mut self` if it's
 a mutable reference. We should default to using `&self`, as it's the most
-common.
+common. Here's an example of all three variants:
+
+```rust
+struct Circle {
+    x: f64,
+    y: f64,
+    radius: f64,
+}
+
+impl Circle {
+    fn reference(&self) {
+       println!("taking self by reference!"); 
+    }
+
+    fn mutable_reference(&mut self) {
+       println!("taking self by mutable reference!"); 
+    }
+
+    fn takes_ownership(self) {
+       println!("taking ownership of self!"); 
+    }
+}
+```
 
 Finally, as you may remember, the value of the area of a circle is `π*r²`.
 Because we took the `&self` parameter to `area`, we can use it just like any

src/doc/trpl/more-strings.md

@@ -278,7 +278,18 @@ This will print:
 
 Many more bytes than graphemes!
 
-# Other Documentation
+# `Deref` coercions
 
-* [the `&str` API documentation](../std/str/index.html)
-* [the `String` API documentation](../std/string/index.html)
+References to `String`s will automatically coerce into `&str`s. Like this:
+
+```
+fn hello(s: &str) {
+   println!("Hello, {}!", s);
+}
+
+let slice = "Steve";
+let string = "Steve".to_string();
+
+hello(slice);
+hello(&string);
+```

src/doc/trpl/pointers.md

@@ -634,8 +634,8 @@ use-case for boxes.
 ### Returning data
 
 This is important enough to have its own section entirely. The TL;DR is this:
-you don't generally want to return pointers, even when you might in a language
-like C or C++.
+you don't want to return pointers, even when you might in a language like C or
+C++.
 
 See [Returning Pointers](#returning-pointers) below for more.
 

src/libstd/process.rs

@@ -264,7 +264,7 @@ impl Command {
     /// By default, stdin, stdout and stderr are captured (and used to
     /// provide the resulting output).
     ///
-    /// # Example
+    /// # Examples
     ///
     /// ```
     /// # #![feature(process)]
@@ -275,8 +275,8 @@ impl Command {
     /// });
     ///
     /// println!("status: {}", output.status);
-    /// println!("stdout: {}", String::from_utf8_lossy(output.stdout.as_slice()));
-    /// println!("stderr: {}", String::from_utf8_lossy(output.stderr.as_slice()));
+    /// println!("stdout: {}", String::from_utf8_lossy(&output.stdout));
+    /// println!("stderr: {}", String::from_utf8_lossy(&output.stderr));
     /// ```
     #[stable(feature = "process", since = "1.0.0")]
     pub fn output(&mut self) -> io::Result<Output> {