Merge branch 'maint'

* maint:
  Update release notes for 1.6.0.3
  checkout: Do not show local changes when in quiet mode
  for-each-ref: Fix --format=%(subject) for log message without newlines
  git-stash.sh: don't default to refs/stash if invalid ref supplied
  maint: check return of split_cmdline to avoid bad config strings

builtin-for-each-ref.c

@@ -321,8 +321,8 @@ static const char *find_wholine(const char *who, int wholen, const char *buf, un
 static const char *copy_line(const char *buf)
 {
 	const char *eol = strchr(buf, '\n');
-	if (!eol)
-		return "";
+	if (!eol) // simulate strchrnul()
+		eol = buf + strlen(buf);
 	return xmemdupz(buf, eol - buf);
 }