The <!--more--> (summary divider) now works even if it is on the same li...

The <!--more--> summary divider would automatically get html escaped by the blackfriday parser unless it was on its own line.  I found it was best to just remove it entirely before parsing.  This allows the <!--more--> tag to be used in a more flexible way.  It would also mean that in a future one might be able to specify their own summaryDivider and it would work regardless of what the parser does with it.

The only downside I see is that <!--more--> will not be in the html output.

Thoughts?