Wikipedia links do not begin with a capital letter

On most Mediawiki sites, article names begin with a capital letter, and making a wiki link such as [[article]] will place the text "article" into the page but will correctly create a link to "/wiki/Article". Interwiki does not capitalize the first letter, and while the links do work, they always cause a redirect on the Mediawiki server. I suggest either modifying $1 to capitalize the first letter of the link name or creating a new pattern that does so.