filtering: test that bookmarks prevent hiding of changesets

discovery: outgoing pass unfiltered repo to findcommonincoming (issue3776) We noa pass an unfiltered repo in the same way `localrepo.push` does. This does not alter outgoing behavior and prevents possible crash with computing common/missing. The `findcommonincoming` code could be simplified to make this unnecessary, but this is too much change for the freeze.

test: minor documentation fix The related test check push, not pull.

largefiles: fix cat when using relative paths from subdirectory