fix #9131, excessive specialization of code_typed
Fix error regarding unescape_string introduced by commit adca441118137f48bd751dfafdc94280b54b2ac6 and introduced some visual spaces.
Merge pull request #9143 from dhoegh/fix_shell_completion_error

Fix error regarding unescape_string introduced by #8838
Merge branch 'master' of github.com:JuliaLang/julia into waT/symbf