std: Whitespace cleanup.

Author: erickt

src/libstd/map.rs

@@ -95,6 +95,7 @@ iface map<K: copy, V: copy> {
     Iterate over all the keys in the map
     */
     fn keys(fn(K));
+
     /*
     Iterate over all the values in the map
     */
@@ -631,4 +632,4 @@ mod tests {
         map.insert(key, "val");
         assert (option::get(map.find(key)) == "val");
     }
-}
+}