many small typofixes

Signed-off-by: Ondřej Bílka <neleai@seznam.cz>
Reviewed-by: Marc Branchaud <marcnarc@xiplink.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

git-p4.py

@@ -1786,7 +1786,7 @@ class P4Submit(Command, P4UserMap):
             missingGitTags = gitTags - p4Labels
             self.exportGitTags(missingGitTags)
 
-        # exit with error unless everything applied perfecly
+        # exit with error unless everything applied perfectly
         if len(commits) != len(applied):
                 sys.exit(1)