This does two things:
1. By default `spack find` no longer shows variants. You have to
supply `-v` to get that
2. This improves the `colify` implementation so that it no longer pads
the rightmost column. This avoids the issue where if one spec was
too long in the output, *all* specs would have space padding added
to that width, and it would look like the output of `spack find`
was double spaced. This no longer happens -- the one bad line
wraps around and the other lines are now single-spaced when you use
`-v` with boost.
17b868381f