Template:Year television plays category/doc

Creates a category of the form "YYYY television plays", where YYYY is a 4-digit year.

e.g.
 * Category:1946 television plays ✅
 * Category:1977 television plays ✅

It is not for use on other types of categories, e.g.


 * Category:1990s television plays ✅
 * Category:1937 in television ❌
 * Category:1975 in television by country ❌
 * Category:2004 plays ❌

Usage
No parameters needed

Errors
If the template is used on an invalid page, an error message is generated and the page is categorised in:
 * Category: (population: )

Errors include:


 * The page is not in the category namespace
 * The page's title does not take the form "YYYY television plays"