auto merge of #11314 : adridu59/rust/patch-license, r=brson

- don't check for an hardcoded copyright claim year, check the 2 surrounding strings instead
- logic: if either the `//` or `#`-style copyright patterns are found, don't invalidate
- cleanup hardcoded content and streamline the few files with different line breaks

r? @brson

src/libsyntax/ext/source_util.rs

@@ -1,5 +1,5 @@
-// Copyright 2012-2013 The Rust Project Developers. See the
-// COPYRIGHT file at the top-level directory of this distribution and at
+// Copyright 2012-2013 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
 // http://rust-lang.org/COPYRIGHT.
 //
 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or