SYNOPSIS
--------
-'git difftool' [--tool=<tool>] [-y|--no-prompt|--prompt] [<'git diff' options>]
+'git difftool' [<options>] <commit>{0,2} [--] [<path>...]
DESCRIPTION
-----------
of the diff post-image. `$BASE` is provided for compatibility
with custom merge tool commands and has the same value as `$LOCAL`.
+-x <command>::
--extcmd=<command>::
Specify a custom command for viewing diffs.
'git-difftool' ignores the configured defaults and runs