Remove debugging code.
Revert "Remove debugging code."

This reverts commit a8617fdce58979cd99e56ad256bf6eba903f0a60.
Remove debugging code.
Don't display x and M flags for registrations.

A registration is *always* indexed so the x flag
is redundant.  Also, the main module flag doesn't
make much sense in the concise diff, which only
displays distributions not packages.