Merge branch 'ik/userdiff-html-h-element-fix' into maint

The built-in pattern to detect the "function header" for HTML did
not match <H1>..<H6> elements without any attributes, which has
been fixed.

* ik/userdiff-html-h-element-fix:
  userdiff: fix HTML hunk header regexp

userdiff.c

@@ -38,7 +38,7 @@ IPATTERN("fortran",
 	 "|//|\\*\\*|::|[/<>=]="),
 IPATTERN("fountain", "^((\\.[^.]|(int|ext|est|int\\.?/ext|i/e)[. ]).*)$",
 	 "[^ \t-]+"),
-PATTERNS("html", "^[ \t]*(<[Hh][1-6][ \t].*>.*)$",
+PATTERNS("html", "^[ \t]*(<[Hh][1-6]([ \t].*)?>.*)$",
 	 "[^<>= \t]+"),
 PATTERNS("java",
 	 "!^[ \t]*(catch|do|for|if|instanceof|new|return|switch|throw|while)\n"