[PATCH 0/4] Various merge / diff tool related minor clean-ups and improvements

This series introduce various minor clean-ups and improvements to the merge / diff tool scripts and documentation.

Sebastian Schuberth (4):
  Use variables for the lists of tools that support merging / diffing
  Explicitly list all valid diff tools and document --tool-help as an
    option
  Make sure to use Araxis' "compare" and not e.g. ImageMagick's
  Add a few more code comments and blank lines in guess_merge_tool

 Documentation/git-difftool.txt         |  9 ++++++---
 contrib/completion/git-completion.bash | 11 +++++++++--
 git-mergetool--lib.sh                  |  6 ++++++
 mergetools/araxis                      |  8 +++++++-
 4 files changed, 28 insertions(+), 6 deletions(-)