"strictly earlier" Conflicts

[Matt Kraai <kraai@alumni.cmu.edu>]

Howdy,

Bug #198304 reports that the move of /usr/bin/svnshell from
subversion to subversion-tools broke upgrades, and suggests
subversion-tools conflict with older versions of subversion.

I was planning to add

 Conflicts: subversion (<< 0.22.1-1)

to subversion-tools's control fields (0.22.1-1 being the version
that moved svnshell), but Policy 7.3 states:

 A Conflicts entry should almost never have an "earlier than"
 version clause.  This would prevent dpkg from upgrading or
 installing the package which declared such a conflict until the
 upgrade or removal of the conflicted-with package had been
 completed.

Is this an "almost never" case?

-- 
Matt Kraai          kraai@alumni.cmu.edu          Debian GNU/Linux