Template:Possible-risk/doc

Usage
Place this template at the top of a template documentation page (suggested: below other top-of-page templates). It supports a customization subpage, separate from the documentation page, for an optional high-use notice, such as high-risk. The customization subpage name is. If the subpage does not exist or is empty, no notice is placed. Ordinarily, the subpage content describes the number of pages using the template, which description is passed to high-risk. Optionally, the subpage content may have a suffix  meaning the description is passed to.

Shifting customization to a subpage insulates the revision history of the documentation page from edits to the count; besides simply uncluttering the documentation history, this means the documentation page can be exported without change to other projects where the template usage may be different.

This template provides a link for creating or altering the customization subpage.

Internals
Logically, the customization subpage is an adjunct to the template documentation, so it would make sense to call it ; however, possible-risk is meant to be used in  space as well as   space, and the   space is wiki-hostile, resisting creation of an ordinary content page unless its name ends with.

If the customization subpage exists, this template calls subtemplate possible-risk/notice to generate the notice box, passing to the subtemplate the parsed leading and trailing parts of the content of the customization subpage. Always, this template calls subtemplate possible-risk/update to generate the create/edit link, passing to the subtemplate a flag indicating whether the customization subpage already exists.