Ignore ; or space after charset in meta tag

[blaaat]

Found some sites using:
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8;">

changed regex to ignore this trailing semicolon.

[alcaeus]

Can you please add a test to cover the new functionality? Ideally, the test fails without your patch and passes with it. Thanks!

[blaaat]

I've added a test (the example above) which fails in the old code base and passes now.

[alcaeus]

Thanks @blaaat!