2D Input operator assignment syntax

The following now produces a remember-table assignment,
instead of assigning a procedure to name f, even though by default
     Typesetting:-Settings(functionassign)
is set to true.

With the previous line of code commented-out the following
line assigns a procedure to name f, as expected.

If you uncomment the previous line, and re-execute the whole
worksheet using !!! from the menubar, then the following will
do a remember-table assignment instead.