Restore missing line breaks in doc/index.html

a30d61b removed all of the trailing whitespace in doc/index.md.
Unfortunately, that trailing whitespace was actually markdown syntax for
line breaks.

doc/index.md

@@ -6,32 +6,32 @@
 .header-section-number { display: none; }
 </style>
 
-[The Rust tutorial](tutorial.html)  ([PDF](tutorial.pdf))
-[The Rust reference manual](rust.html) ([PDF](rust.pdf))
+[The Rust tutorial](tutorial.html)  ([PDF](tutorial.pdf))  
+[The Rust reference manual](rust.html) ([PDF](rust.pdf))  
 
 # Guides
 
-[Pointers](guide-pointers.html)
-[References and Lifetimes](guide-lifetimes.html)
-[Containers and Iterators](guide-container.html)
-[Tasks and Communication](guide-tasks.html)
-[Foreign Function Interface](guide-ffi.html)
-[Macros](guide-macros.html)
-[Packaging](guide-rustpkg.html)
-[Testing](guide-testing.html)
+[Pointers](guide-pointers.html)  
+[References and Lifetimes](guide-lifetimes.html)  
+[Containers and Iterators](guide-container.html)  
+[Tasks and Communication](guide-tasks.html)  
+[Foreign Function Interface](guide-ffi.html)  
+[Macros](guide-macros.html)  
+[Packaging](guide-rustpkg.html)  
+[Testing](guide-testing.html)  
 [Conditions](guide-conditions.html)
 
 # Libraries
 
-[The standard library, `libstd`](std/index.html)
+[The standard library, `libstd`](std/index.html)  
 [The extra library, `libextra`](extra/index.html)
 
-[The M:N runtime library, `libgreen`](green/index.html)
+[The M:N runtime library, `libgreen`](green/index.html)  
 [The 1:1 runtime library, `libnative`](native/index.html)
 
 [The Rust packaging library, `librustpkg`](rustpkg/index.html)
 
-[The Rust parser, `libsyntax`](syntax/index.html)
+[The Rust parser, `libsyntax`](syntax/index.html)  
 [The Rust compiler, `librustc`](rustc/index.html)
 
 # Tooling
@@ -40,14 +40,14 @@
 
 # FAQs
 
-[Language FAQ](complement-lang-faq.html)
-[Project FAQ](complement-project-faq.html)
-[Usage FAQ](complement-usage-faq.html)
-[Code cheatsheet](complement-cheatsheet.html) - "How do I do X?"
+[Language FAQ](complement-lang-faq.html)  
+[Project FAQ](complement-project-faq.html)  
+[Usage FAQ](complement-usage-faq.html)  
+[Code cheatsheet](complement-cheatsheet.html) - "How do I do X?"  
 [How to submit a bug report](complement-bugreport.html)
 
 # External resources
 
-The Rust [IRC channel](http://chat.mibbit.com/?server=irc.mozilla.org&channel=%23rust) - `#rust` on irc.mozilla.org
-The Rust community on [Reddit](http://reddit.com/r/rust)
+The Rust [IRC channel](http://chat.mibbit.com/?server=irc.mozilla.org&channel=%23rust) - `#rust` on irc.mozilla.org  
+The Rust community on [Reddit](http://reddit.com/r/rust)  
 The Rust [wiki](http://github.com/mozilla/rust/wiki)