When running Sage, if I look at some docststrings by doing foo.bar?, I see at the top
WARNING: the enclosing module is marked 'needs sage.graphs', so doctests may not pass.
Of course my copy of Sage has (as far as I know!) a working copy of sage.graphs. Should this warning only be printed conditionally when the module is missing? I took a quick look and didn't see a relevant ticket, but I might very well have missed it.