Module:Trim quotes

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 localp={}

 functionp._trim(s)
 ifsthen
 ifs:match([[^(['"]).*%1$]]) then return p._trim(string.sub(s,2,-2)) else return s end
 	else
 		return ""
 	end
 end

 function p.trim(frame)
 	local s = (frame.args['s'] or frame.args[1]) or (frame:getParent().args['s'] or frame:getParent().args[1])
 	return p._trim(s)
 end

 return p

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