Fix typo with --send-email [sic] flags

The actual flag is --send-mail. Also includes a fix
to publish these changes if a comment is included.

Bug: 740950
Change-Id: I38ca0a35c1364c8364eb0ef301137c04daede40b
Reviewed-on: https://chromium-review.googlesource.com/572033
Reviewed-by: Andrii Shyshkalov <tandrii@chromium.org>
Commit-Queue: Aaron Gable <agable@chromium.org>
diff --git a/git_cl.py b/git_cl.py
index d239680..2933b00 100755
--- a/git_cl.py
+++ b/git_cl.py
@@ -3040,7 +3040,7 @@
         refspec_opts.append('notify=NONE')
 
     # TODO(tandrii): options.message should be posted as a comment
-    # if --send-email is set on non-initial upload as Rietveld used to do it.
+    # if --send-mail is set on non-initial upload as Rietveld used to do it.
 
     if title:
       if not re.match(r'^[\w ]+$', title):