This template may have no transclusions, because it was replaced with a magic word.
The magic word {{!}} is used to escape a vertical bar character "|" in wikitext markup, causing the parser to temporarily not interpret it as a special character.
This used to be a template, but for speed reasons, the MediaWiki parser was changed in July 2014 to instantly interpret {{!}} as "|" and ignore this template, making {{!}} a magic word. You can continue to use the code in exactly the same way as before.
Do not use syntax like {{Template:!}}, and do not supply a parameter, for example {{!|foo}}. In those cases, the template transcludes as an error message: Error: The retired template {{!}} has been transcluded; see mw:Help:Magic words#Other for details. To fix this, use only the code {{!}} to generate the | character.
Usage
The code {{!}} is used to escape the vertical bar character, |, so that it is interpreted later than it would be otherwise. This is mostly useful when trying to include a table in a template. For example,
{{rquote|none|text=
{| class="wikitable"
|+ Caption text
|-
! Header text !! Header text
|-
| Example || Example
|-
| Example || Example
|}
}}
yields nonsense:
“
{
”
— -
Header text
Header text
, -
However escaping the bars with this magic word and similar templates gives:
{{rquote|none|2=<nowiki></nowiki>{{(!}}class{{=}}"wikitable"
{{!}}+ Caption text
{{!}}-
! Header text !! Header text
{{!}}-
{{!}} Example {{!!}} Example
{{!}}-
{{!}} Example {{!!}} Example
{{!)}}
}}
“
Caption text
Header text
Header text
Example
Example
Example
Example
”
For how to include a table in a footnote, do:
Example 1{{refn|group=note|This is a note before}}
Example 2{{refn|group=note|1=<nowiki></nowiki>{{(!}}class{{=}}"wikitable"
{{!}}+Example table with two columns
!A column
!Another column
{{!}}-
{{!}} Some data
{{!}} Some more data
{{!)}}<nowiki></nowiki>}}
Example 3{{refn|group=note|This is a note after}}
==Notes==
{{Reflist|group=note}}
