annotate requires `-r'

[Golubev I. N.]

`cvs annotate' requires a working directory, so number / tag of
currently checked out revision / branch is available to it.  However,
it always displays head revision (as documented), unlike, e. g.,
`update -p' which would retrieve current revision.  One has to specify
`-r' explicitly if current branch is not the main one.

Are there any strong reasons to ignore sticky tags in `annotate'?  If
there are, why working directory is required at all?  Why not allow it
to work like `rdiff' or `rtag'?