core/std: whitespace fixes.

src/libcore/core.rs

@@ -3,7 +3,7 @@
 // Export type option as a synonym for option and export the some and none
 // enum constructors.
 
-import option::{some,  none};
+import option::{some, none};
 import option = option::t;
 import vec::vec_len;
 export option, some, none, vec_len;

src/libstd/io.rs

@@ -506,8 +506,9 @@ fn mk_mem_buffer() -> mem_buffer {
 fn mem_buffer_writer(b: mem_buffer) -> writer { b as writer }
 fn mem_buffer_buf(b: mem_buffer) -> [u8] { vec::from_mut(b.buf) }
 fn mem_buffer_str(b: mem_buffer) -> str {
-   let b_ = vec::from_mut(b.buf);
-   str::from_bytes(b_)
+    let b_ = vec::from_mut(b.buf);
+    str::from_bytes(b_)
+}
 
 fn with_str_writer(f: fn(writer)) -> str {
     let buf = mk_mem_buffer();