auto merge of #17402 : steveklabnik/rust/update_manual, r=brson

Because I'm still 😷 😷 😷 , I figured some mindless tasks would be better than trying to finish the ownership guide. 

The manual has long been waiting for some ❤️ ❤️ ❤️ , and so I gave it a quick once-over. I made small commits in case any of the changes are a bit weird, I mostly did a few things:

1. changed 'manual' to 'reference.' I feel like this name is better. If it's not, It's not a huge deal. it shouldn't be `rust.md` though.
2. word wrapped everything appropriately. Changes 1&2 are in the first commit, so that its' easier to see the changes in the later ones.
3. fixed other small style issues
4. removed references to things that are in the standard library, and not the language itself

There's still lots of gross in here, but I didn't want to pile on too too many changes.

/cc @brson @nikomatsakis

mk/docs.mk

@@ -29,9 +29,9 @@ DOCS := index intro tutorial guide guide-ffi guide-macros guide-lifetimes \
 	guide-tasks guide-container guide-pointers guide-testing \
 	guide-runtime complement-bugreport \
 	complement-lang-faq complement-design-faq complement-project-faq rust \
-    rustdoc guide-unsafe guide-strings
+    rustdoc guide-unsafe guide-strings reference
 
-PDF_DOCS := guide rust
+PDF_DOCS := guide reference
 
 RUSTDOC_DEPS_rust := doc/full-toc.inc
 RUSTDOC_FLAGS_rust := --html-in-header=doc/full-toc.inc

src/doc/README.md

@@ -30,7 +30,7 @@ To generate an HTML version of a doc from Markdown manually, you can do
 something like:
 
 ~~~~
-pandoc --from=markdown --to=html5 --number-sections -o rust.html rust.md
+pandoc --from=markdown --to=html5 --number-sections -o reference.html reference.md
 ~~~~
 
 (rust.md being the Rust Reference Manual.)

src/doc/index.md

@@ -46,7 +46,7 @@ development of Rust itself is discussed.
 # Specification
 
 Rust does not have an exact specification, but an effort to describe as much of
-the language in as much detail as possible is in [the manual](rust.html).
+the language in as much detail as possible is in [the reference](reference.html).
 
 # Guides
 

src/doc/not_found.md

@@ -13,7 +13,7 @@ Some things that might be helpful to you though:
 
 ## Reference
 * [The Rust official site](http://rust-lang.org)
-* [The Rust reference manual](http://doc.rust-lang.org/rust.html) (* [PDF](http://doc.rust-lang.org/rust.pdf))
+* [The Rust reference](http://doc.rust-lang.org/reference.html) (* [PDF](http://doc.rust-lang.org/reference.pdf))
 
 ## Docs
 * [The standard library](http://doc.rust-lang.org/std/)