hg-core: silence dead-code warning by adding RevlogEntry::revion() accessor...
hg-core: silence dead-code warning by adding RevlogEntry::revion() accessor
Nightly `rustc` warns about the `RevlogEntry::rev` field not being
used. Rather than removing it, I added an accessor since it seems
useful to be able to get the entry's revision.
Differential Revision:
https://phab.mercurial-scm.org/D11548