[Aptitude-devel] Bug#687474: aptitude: [cmdline] package, version selection is ad hoc, inconsistent

[Daniel Hartwig]

The only variation between commands *must* be:
- which version is the default (that is, current, candidate, etc.);
- whether search patterns are accepted.

Two commands with the same default and both accepting search patterns,
when given the same arguments, absolutely must act on the same versions
of the same packages.