f722e03e

By: Tom Sydney Kerckhove <syd@cs-syd.eu>

Keep the whitespace within a comment

The lexer stripped the text of a comment, so a comment that lined something up
lost its alignment when the file was formatted.

The marker is the whole "-- ", including the space, so dropping just the two
dashes left that space in the text.  Stripping made the space come back out as
one again, at the cost of every other space.  Dropping the marker instead keeps
the text exactly as written.

The generator stripped to match, which is why the roundtrip property did not
catch this.

Timeline