MINOR: add limit to maximal size of subject

to long subject messages are equally bad as very short ones.
Limit of 100 characters and 15 words seems good,
anything beyond that should go in commit body

Author: oktalz

check-commit/check.go

@@ -78,6 +78,9 @@ func checkSubject(subject string) error {
 	if len(subject) < 15 || len(strings.Split(subject, " ")) < 3 {
 		return fmt.Errorf("Too short or meaningless commit subject '%s'", subject)
 	}
+	if len(subject) > 100 || len(strings.Split(subject, " ")) > 15 {
+		return fmt.Errorf("Too long commit subject '%s'", subject)
+	}
 	return nil
 }
 
@@ -107,7 +110,7 @@ func main() {
 		log.Println("Handling Merge Request:\n", subject)
 		parts := strings.Fields(subject)
 		if len(parts) != 4 {
-			log.Fatal(fmt.Errorf("Unkown Merge commit format '%s'\n", subject))
+			log.Fatal(fmt.Errorf("Unknown Merge commit format '%s'\n", subject))
 		}
 		out, err = exec.Command("git", "log", parts[3]+".."+parts[1], "--pretty=format:'%s'").Output()
 		if err != nil {