git p4: standardize submit cancel due to unchanged template

When editing the submit template, if no change was made to it,
git p4 offers a prompt "Submit anyway?".  Answering "no" cancels
the submit.

Previously, a "no" answer behaves like a "[s]kip" answer to the
failed-patch prompt, in that it proceeded to try to apply the
rest of the commits.  Instead, put users back into the new
"[s]kip / [c]ontinue" loop so that they can decide.  This makes
both cases of patch failure behave identically.

The return code of git p4 after a "no" answer is now the same
as that for a "skip" due to failed patch; update a test to
understand this.

Signed-off-by: Pete Wyckoff <pw@padd.com>
Acked-by: Luke Diamand <luke@diamand.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

git-p4.py

@@ -1262,6 +1262,7 @@ class P4Submit(Command, P4UserMap):
 
         if self.edit_template(fileName):
             # read the edited message and submit
+            ret = True
             tmpFile = open(fileName, "rb")
             message = tmpFile.read()
             tmpFile.close()
@@ -1285,6 +1286,7 @@ class P4Submit(Command, P4UserMap):
 
         else:
             # skip this patch
+            ret = False
             print "Submission cancelled, undoing p4 changes."
             for f in editedFiles:
                 p4_revert(f)
@@ -1293,7 +1295,7 @@ class P4Submit(Command, P4UserMap):
                 os.remove(f)
 
         os.remove(fileName)
-        return True  # success
+        return ret
 
     # Export git tags as p4 labels. Create a p4 label and then tag
     # with that.

t/t9805-git-p4-skip-submit-edit.sh

@@ -38,7 +38,7 @@ test_expect_success 'no config, unedited, say no' '
 		cd "$git" &&
 		echo line >>file1 &&
 		git commit -a -m "change 3 (not really)" &&
-		printf "bad response\nn\n" | git p4 submit &&
+		printf "bad response\nn\n" | test_expect_code 1 git p4 submit &&
 		p4 changes //depot/... >wc &&
 		test_line_count = 2 wc
 	)