Mark,
from key help: c-h k c-m-j:
C-M-j runs the command indent-new-comment-line (found in global-map),
which is an alias for ‘comment-indent-new-line’ in ‘newcomment.el’.
It is bound to C-M-j, M-j.
(indent-new-comment-line &optional SOFT)
It could be argued that when you are in a comment, you should stay in a comment.
Like in paredit, when you’re in a list and type RET, you go to a new-line, indented in the list.
You have to type ) to get out of the list (or some other ‘up’ command. (or when you’re in a docstring, RET
stays in the docstring, and you have to use paredit-forward-up (C-M-n) to get out of it.
Then, similarly, you could bind RET to indent-new-comment-line, and use C-RET for usual newline-and-indent.
Or extend paredit-forward-up to get you out of the comment (both #|comments|# and ;comments).
--
__Pascal J. Bourguignon__