parser should not allow fun(,) or fun(x,) for internals
@mottelet)
Reported by Stéphane MOTTELET (BUG DESCRIPTION:
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max(,) incorrectly calls overloading instead of signaling an incorrect number of inputs
ERROR LOG:
----------
--> max(,)
in builtin max
Function not defined for given argument type(s),
check arguments or define function %_max for overloading.
--> cos(,)
cos: Wrong number of input argument(s): 1 expected.