Merge pull request #823 from lvillani/rust-highlight-where-keyword

Rust: highlight the "where" keyword

lib/rouge/lexers/rust.rb

@@ -18,8 +18,8 @@ def self.keywords
         @keywords ||= %w(
           as assert break const copy do drop else enum extern fail false
           fn for if impl let log loop match mod move mut priv pub pure
-          ref return self static struct true trait type unsafe use while
-          box
+          ref return self static struct true trait type unsafe use where
+          while box
         )
       end
 

spec/visual/samples/rust

@@ -37,7 +37,10 @@ impl<A> &[A]: iterable<A> {
     }
 }
 
-fn length<A, T: iterable<A>>(x: T) -> uint {
+fn length<A, T>(x: T) -> uint
+where
+    T: iterable<A>,
+{
     let mut len = 0;
     for x.iterate() |_y| { len += 1 }
     return len;