Pierre-Yves David <pierre-yves.david@ens-lyon.org> [Wed, 16 Jan 2013 00:46:29 +0100] rev 18398
test: fix in-test comments related to obsolescence
The `ui.prevent-unstable` option never made it into core. It always behaves
this way when obsolescence feature is enabled.
See changesets c5bd753c5bc6, bacf55bd8f90 and 0f5a0a2073a8 for details.