Support for space before marker is broken

[seangifford]

Hi, this is already an existing bug (#3), but creating this new hoping that @negrutiu will be generous enough to take a look at it.
Basically, as described in https://github.com/jgyo/remarker/wiki markers should be identified if there is a space before them. This is a welcome feature, as code style analyzers will complain that there should always be a space at the beginning of a comment. Unfortunately, this is currently broken, so adding a space at the beginning of the comment (therefore preceding the marker) means the marker will NOT be identified and no formatting will be done.