Tags: patch

Tried to customize 'comment-region' to use multi-line comments,
so when commenting out such region in html-mode:

line 1
line 2
line 3

instead of adding comments to each line:

<!-- line 1 -->
<!-- line 2 -->
<!-- line 3 -->

to add comments only at the beginning/end:

<!--
line 1
line 2
line 3
  -->

According to the documentation, a legitimate way to do this is
to use such customization:

(setq-local comment-style 'extra-line
            comment-continue "")

But currently it has no effect.  So needed to fix newcomment.el.
One possible fix is to return the original string from 'comment-padright'
even when the string contains only whitespace.  Maybe this would be
the right fix, but still not sure about other calls of 'comment-padright'.
So a safer fix would be to do this in the caller: