A test case for strong syntax fails

[whichxjy]

In tests/markdown011.bs, a test case for strong syntax fails: the text **High-light 1337! @twitter #hashtag ☃** couldn't be transformed into <strong>High-light 1337! @twitter #hashtag ☃</strong> since the regex ((?P<left>[^\\])|^)\*\*(?P<inner_text>[^\s][^*]*[^\s][^\\])\*\* couldn't match it.

But when the text is edited to **High-light 1337! @twitter #hashtag ☃[DELETE ME!]**, it could be transformed into <strong>High-light 1337! @twitter #hashtag ☃[DELETE ME!]</strong>.

Maybe it's about the charset or something.