5ee85db5f4
- Fix use of String operator + in IO libraries. Previously reviewed as part of https://chromiumcodereview.appspot.com/9690003 Review URL: https://chromiumcodereview.appspot.com//9725001 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@5597 260f80e4-7a28-3924-810f-c04153c831b5