revert: ask user to confirm before tracking new file when interactive If interactively reverting from a commit with `hg revert -i -r`, we would unconditionally add files from that commit that are not already tracked in the working copy. We have prompts for adding back files removed in the working copy, but that's specific to such files and does not apply to adding files from another revision. Differential Revision: https://phab.mercurial-scm.org/D12416