Template:Category explanation/doc

This template is for use on category pages (in the Category: namespace), producing a hatnote describing the category. It takes a single parameter – the category description –  producing the hatnote:
 * This category is for

followed by that description. Any spaces surrounding the parameter are removed, and a space is inserted before it. It should be worded so as to make the result a complete English sentence. A period (full stop) will be added to the end if the parameter does not already end with a period. The hatnote is indented and on a new line (technically, in a new ).

Examples

 * This code: produces:
 * This code: produces:
 * This code: (undesirably) produces: