tests/test-context.py.out

clfilter: ensure context raise RepoLookupError when the revision is filtered

Currently the code path of `changectx(filteredrepo, rev)` call
`filteredrepo.changelog.node(rev)`. When `rev` is filtered this raise an
unhandled `IndexError`. This case now raise a `RepoLookupError` as other
error case do.

workingfilectx.date = (1000, 0)
ASCII   : Gr?ezi!
Latin-1 : Grüezi!
UTF-8   : Grüezi!