vhdl-comment-only-line-offset

vhdl-comment-only-line-offset is a variable defined in `vhdl-mode.el'.
Its value is

0

Documentation:
Extra offset for line which contains only the start of a comment.
Can contain an integer or a cons cell of the form:

(NON-ANCHORED-OFFSET . ANCHORED-OFFSET)

Where NON-ANCHORED-OFFSET is the amount of offset given to
non-column-zero anchored comment-only lines, and ANCHORED-OFFSET is
the amount of offset to give column-zero anchored comment-only lines.
Just an integer as value is equivalent to ( . 0)