[PATCH 8 of 8 git-diff] patch: add label for coloring the similarity extended header

[Sean Farley]

# HG changeset patch
# User Sean Farley <sean at farley.io>
# Date 1483988505 28800
#      Mon Jan 09 11:01:45 2017 -0800
# Node ID 0ac83cc1715c18537e3f8087d32544db25cd29d0
# Parent  57b97693c687ab32b57bd3a75311237106992de9
patch: add label for coloring the similarity extended header

Just like the summary says, this will colorize the:

  similarity index 88%

line in the diff output.

diff --git a/mercurial/patch.py b/mercurial/patch.py
--- a/mercurial/patch.py
+++ b/mercurial/patch.py
@@ -2348,10 +2348,11 @@ def difflabel(func, *args, **kw):
                     ('rename', 'diff.extended'),
                     ('old', 'diff.extended'),
                     ('new', 'diff.extended'),
                     ('deleted', 'diff.extended'),
                     ('index', 'diff.extended'),
+                    ('similarity', 'diff.extended'),
                     ('---', 'diff.file_a'),
                     ('+++', 'diff.file_b')]
     textprefixes = [('@', 'diff.hunk'),
                     ('-', 'diff.deleted'),
                     ('+', 'diff.inserted')]