[cl-migrations-devel] Sort with n > 9

[Sasha Kovar]

Hi.  

Attached is a patch to compare-files which fixes a problem with the ordering
of migration files.  On my system (linux, SBCL 1.0.0) when I added my tenth
migration, it sorted "10-" after "1-" and before "2-".  I suspect you wanted
numeric rather than lexicographic order :)

Thanks very much for cl-migrations.  That plus clsql plus
clsql-pg-introspect equals one happy developer!

Sasha