Option to use underscore bold and italic

[EvitanRelta]

Underscore bold and italic are in the form:

__bold__, _italic_

The reason both bold and italics are currently asterisks * only, is cuz of this edge case:

PREFIX__bold__, PREFIX_italic_

PREFIX**bold**, PREFIX*italic*

which renders as:

PREFIX__bold__, PREFIX_italic_

PREFIXbold, PREFIXitalic

The question is (or i guess "are"):

• How do we detect if a bold/italic is prefixed (without spaces inbetween)?
• What should HTMLarkdown do if its set to use underscore, and those edge cases happen?
  Should it:
  • Use asterisks?
  • or use HTML-syntax (ie. <b>, <i>)