Switch back to manual variants for key properties, part 1

The fact that properties don't actually receive the argument they
necessarily 'say' they do means manual handling is safest. Thus we
go back to doing each variant by hand. In this check in, only the
single-arg properties are 'fixed': the next check in will deal
with .choices:nn and .multichoices:nn.


git-svn-id: http://www.latex-project.org/svnroot/experimental/trunk@4518 de43f980-851b-0410-b2f7-c40aca1f87e0
Missed one piece of documentation


git-svn-id: http://www.latex-project.org/svnroot/experimental/trunk@4519 de43f980-851b-0410-b2f7-c40aca1f87e0