Refactored out individual VCS completions.
Autogenerated completions for Mercurial using a recent version (no extensions installed).
Formatting cleanup of builtin_contains
Teach fish about rxvt's special key bindings
https://github.com/fish-shell/fish-shell/issues/657
Fix typos in count documentation
Fix __fish_filter_mime to not pass 0 to seq
Make trap sort of work on OS X
https://github.com/fish-shell/fish-shell/issues/607
Tiny typo.