Template:!/doc

| is a magic word used to escape a pipe character "|" in wikitext, where it would otherwise be interpreted as a special character. Typically this is used when "|" is needed as part of a template argument or table cell contents.

This was formerly an actual template. In July 2014, the MediaWiki parser was updated to interpret  as a magic word for performance reasons. From an editor's perspective, there is no difference; the magic word is used in the exact same manner as the template. However, if this template is transcluded in some way, an error message will be displayed and the page that transcludes it will be added to Category:Pages that use a template in place of a magic word.

The HTML character code  may be used instead of this magic word in situations where it should never be interpreted as anything except a literal character.