Cleaned up imports per coding standards.

No functional changes; just style.

src/libstd/ascii.rs

@@ -10,7 +10,7 @@
 
 //! Operations on ASCII strings and characters
 
-use to_str::{ToStr,IntoStr};
+use to_str::{ToStr, IntoStr};
 use str;
 use str::Str;
 use str::StrSlice;
@@ -18,9 +18,9 @@ use str::OwnedStr;
 use container::Container;
 use cast;
 use iter::Iterator;
-use vec::{ImmutableVector,MutableVector,Vector};
+use vec::{ImmutableVector, MutableVector, Vector};
 use to_bytes::IterBytes;
-use option::{Option,Some,None};
+use option::{Option, Some, None};
 
 /// Datatype to hold one ascii character. It wraps a `u8`, with the highest bit always zero.
 #[deriving(Clone, Eq, Ord, TotalOrd, TotalEq)]