
Changes to MAKE-PARTIAL-PARSER-FUN and supporting functions. If a
command argument is unspecified and there is no default specified for
that argument, then don't pass any any :default argument to the
corresponding call to ACCEPT. Also, don't modify the variables that
hold the return values for the arguments unless the user actually
changes the value; this preserves thhe unspecified argument marker.

This fixes the bug show-cmd-table-arg.

quek/mcclim,informatimago/mcclim,quek/mcclim,informatimago/mcclim