[Bug fortran/60751] Extra comma in WRITE statement not diagnosed

[dominiq at lps dot ens.fr]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60751

--- Comment #17 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Note that the extra comma is used in the following tests:

gfortran.dg/array_constructor_49.f90
gfortran.dg/integer_exponentiation_6.F90
gfortran.dg/graphite/pr38083.f90

Any reason to keep it?