go-md2man happily ignores our comment lines in most cases,
but sphinx (used in readthedocs) cannot deal with comments
if they immediately follow any other content line:
blah blah
[//]: # (my comment)
...the whole comment line is actually rendered in its output.
Only solution seems to be to add extra newlines before each
comment. Makes diff and PR review harder, but otherwise has
no effect on the rendered documents.
Signed-off-by: Ed Santiago <santiago@redhat.com>