``*?``, ``+?``, ``??``
The ``'*'``, ``'+'``, and ``'?'`` qualifiers are all :dfn:`greedy`; they match
as much text as possible. Sometimes this behaviour isn't desired; if the RE
- ``<.*>`` is matched against ``'<H1>title</H1>'``, it will match the entire
- string, and not just ``'<H1>'``. Adding ``'?'`` after the qualifier makes it
+ ``<.*>`` is matched against ``<a> b <c>``, it will match the entire
+ string, and not just ``<a>``. Adding ``?`` after the qualifier makes it
perform the match in :dfn:`non-greedy` or :dfn:`minimal` fashion; as *few*
- characters as possible will be matched. Using ``.*?`` in the previous
- expression will match only ``'<H1>'``.
+ characters as possible will be matched. Using the RE ``<.*?>`` will match
+ only ``<a>``.
``{m}``
Specifies that exactly *m* copies of the previous RE should be matched; fewer