[build2] Bug: 'unterminated multi-line comment' error occurred when '#\' is on the last line of buildfile

[Boris Kolpackov]

good 770326 via users <users at build2.org> writes:

> I'm not sure it is too marginal to feedback via email, but it seems could
> be reproduced always, and it recovers when an extra blank line is added to
> the end. (version 0.14.0)

In build2 buildfiles the `#\` sequence starts/ends a multi-line comment,
for example:

#\
This is
ignored.
#\

For details, see:

https://build2.org/build2/doc/build2-build-system-manual.xhtml#intro-lang