subrepo: rename relpath to subrelpath and introduce reporelpath

mdiff: carriage return (\r) is also ignorable whitespace

merge: add --tool argument to merge and resolve These arguments are shorthand for --config ui.merge, but they also override HGMERGE if it is found in the user's environment.

patchbomb: move command option help from the extension (patchbomb) to the command (email)

alias: fail gracefully when invalid global options are given (issue2442) This patch modifies the check for shell aliases to prevent crashing when an invalid global option is given. When an invalid global option is given the check will simply return and let the normal error handling for this case happen.

bookmarks: better fix for issue2016 (lookup infinite recursion) 741290486877 partially reverted by Patrick Mézard <pmezard@gmail.com>

merge/progress: marking strings for localization

verify/progress: using gerund to indicate action and adding units

progress: dropping superfluous space from units

check-code: add 'no tab indent' check for unified tests and fix the offending tests accordingly