Defining a nested single-line comment within a multi-line comment invites errors. It may lead a developer to wrongly think that the lines located after the single-line comment are not part of the comment.
If a comment starting sequence, ``/*`` or ``//``, occurs within a ``/*`` comment, is it quite likely to be caused by a missing ``*/`` comment ending sequence.
If a comment starting sequence occurs within a ``//`` comment, it is probably because a region of code has been commented-out using ``//``.
