[PATCH 0/8] Add color test for range-diff, simplify diff.c

This is based on origin/js/range-diff (c255a588bcd) and is also available
via
  git fetch https://github.com/stefanbeller/git ws_cleanup-ontop-range-diff-2 

This adds some color testing to range-diff and then attempts to make the code in diff.c around emit_line_0 more readable.

I think we can go further bit more (by e.g. cherry-picking "ws: do not reset and set color twice" found at [1]), but that would be feature work. This series doesn't change any existing tests!

[1] https://github.com/stefanbeller/git/tree/ws_cleanup-ontop-range-diff

Thanks, Stefan

Stefan Beller (8):
  test_decode_color: understand FAINT and ITALIC
  t3206: add color test for range-diff --dual-color
  diff.c: simplify caller of emit_line_0
  diff.c: reorder arguments for emit_line_ws_markup
  diff.c: add set_sign to emit_line_0
  diff: use emit_line_0 once per line
  diff.c: compute reverse locally in emit_line_0
  diff.c: rewrite emit_line_0 more understandably

 diff.c                  | 94 +++++++++++++++++++++++------------------
 t/t3206-range-diff.sh   | 39 +++++++++++++++++
 t/test-lib-functions.sh |  2 +
 3 files changed, 93 insertions(+), 42 deletions(-)