We shouldn't strip blank comments in code in lint doc generation

[Manishearth]

See https://rust-lang.github.io/rust-clippy/master/index.html#empty_line_after_outer_attr

The blank lines in the source (important for this lint) are removed from the docs, since the doc generation step strips empty lines (before hitting any kind of markdown parser)

I'm not quite sure why we do that at all, but we shouldn't be doing it within code.

(It's late so I haven't yet investigated)

[phansch]

This bug sounds vaguely familiar. I believe the bug is somewhere in

rust-clippy/util/export.py

Line 19 in cbae9ed

def parse_lint_def(lint):

or here:

rust-clippy/util/lintlib.py

Lines 69 to 72 in cbae9ed

	else:
	m = comment_re.search(line)
	if m:
	comment.append(m.group(1))

For anyone investigating, comment in lintlib.py is called doc in export.py.