Merge branch 'jk/commit-die-on-bogus-ident' into maint

* jk/commit-die-on-bogus-ident:
  commit: die before asking to edit the log message
  ident: die on bogus date format

t/t7501-commit.sh

@@ -230,6 +230,10 @@ test_expect_success 'amend commit to fix date' '
 
 '
 
+test_expect_success 'commit complains about bogus date' '
+	test_must_fail git commit --amend --date=10.11.2010
+'
+
 test_expect_success 'sign off (1)' '
 
 	echo 1 >positive &&