re_cover_cc = re.compile('^Cover-letter-cc: *(.*)')
# Patch series tag
-re_series = re.compile('^Series-(\w*): *(.*)')
+re_series = re.compile('^Series-([a-z-]*): *(.*)')
# Commit tags that we want to collect and keep
re_tag = re.compile('^(Tested-by|Acked-by|Reviewed-by|Cc): (.*)')