The search box at the top of every page supports Regular-Expression (“Regexp”) based searches. Obviously, you can just type a word or phrase into the search box, and hit return. But Regular Expressions allow you to craft much more elaborate searches.

The searches are, by default, case-insensitive.

For a quicky Regexp tutorial, see this page. Here are some example searches you can try

  • (bzr|bazaar)
  • init[^\w]
  • wiki\s?word

If your search comes up empty-handed, there’s a link to create a new page by that name (possibly useful for a word or phrase; less so for a Regexp search).