Append to an indented comment.
Creates a new comment if none exists.
Appends a newline character and the specified string otherwise.
\param ea linear address
\param str comment string to append
\param rptble append to repeatable comment?
\return success
Set an indented comment.
\param ea linear address
\param comm comment string
- nullptr: do nothing (return 0)
- “” : delete comment
\param rptble is repeatable?
\return success