Git index revision ids might have more that 7 characters.

Author: jopereira

whatthepatch/patch.py

@@ -41,7 +41,7 @@
 
 # git has a special index header and no end part
 git_diffcmd_header = re.compile('^diff --git a/(.+) b/(.+)$')
-git_header_index = re.compile('^index ([\w]{7})..([\w]{7}) ?(\d*)$')
+git_header_index = re.compile('^index ([a-f0-9]+)..([a-f0-9]+) ?(\d*)$')
 git_header_old_line = re.compile('^--- (.+)$')
 git_header_new_line = re.compile('^\+\+\+ (.+)$')
 git_header_file_mode = re.compile('^(new|deleted) file mode \d{6}$')