Collating bug with period?

[Petter Reinholdtsen]

[Ole Laursen]
> I can reproduce this on different Red Hat systems. Is this a bug?

Nope.  It is a feature.  The sorting method is called multilevel
sorting, and the point seen here is that the first level is letters
only, and period is ignored at this level.  The result is that "a.a"
and "aa" is sorted as if both were "aa" on the first level.  The other
levels are only consulted if the previous levels didn't manage to
order the strings relative to each other based on the information in
the previous level.