De-~[] Mem{Reader,Writer}

src/librustdoc/html/highlight.rs

@@ -34,7 +34,7 @@ pub fn highlight(src: &str, class: Option<&str>) -> ~str {
          lexer::new_string_reader(&sess.span_diagnostic, fm),
          class,
          &mut out).unwrap();
-    str::from_utf8_lossy(out.unwrap()).into_owned()
+    str::from_utf8_lossy(out.unwrap().as_slice()).into_owned()
 }
 
 /// Exhausts the `lexer` writing the output into `out`.

src/librustdoc/html/render.rs

@@ -312,7 +312,7 @@ pub fn run(mut krate: clean::Crate, dst: Path) -> io::IoResult<()> {
         }
         try!(write!(&mut w, "\\};"));
 
-        str::from_utf8_owned(w.unwrap()).unwrap()
+        str::from_utf8(w.unwrap().as_slice()).unwrap().to_owned()
     };
 
     // Write out the shared files. Note that these are shared among all rustdoc