Comment 9 for bug 672530

I think that would be a regression from the current interface and behaviour. This bug is filed on the assumption that Bazaar just makes it hard to parse some options to the underlying diff process for no apparent reason. That's not the case, bzr doesn't use an external diff unless --diff-options is given. Documenting new flags that would then fail for no apparent reason with the all-in-one installer (see bug 673114) is a nastier bug than requiring some extra typing in order to use an external diff.