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This subtemplate deals with a parameter which may be passed from elsewhere, and has an unknown format.
The template checks: when the 1st parameter is a "-
" (minus/hyphen), nothing is done;
otherwise it checks whether the 1st parameter starts with "[[Cat
":
[[Category:
"]]
", and then passed.The 2nd parameter may be any sorting item:
2=
", or " 
" or "␢
".