def _make_continuation_prompt(self, prompt):
end_chars = '<STR_LIT>'<EOL>space_count = len(prompt.lstrip('<STR_LIT:\n>')) - len(end_chars)<EOL>body = '<STR_LIT>' * space_count + end_chars<EOL>return '<STR_LIT>' % body<EOL>
Given a plain text version of an In prompt, returns an HTML
            continuation prompt.