Both 'git log' and 'git blame' support the same format
of '-L' arguments, so we refactor its description into
a new file.
And it is possible to use more than one '-L' option
for each path.
Signed-off-by: Bo Yang <struggleyb.nku@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
