[Patch, Fortran] PR32987 - Allow TAB in FORMAT statements as extension and warn with -std=f*

[Tobias Burnus]

Jerry DeLisle schrieb:
> I think everyone is in agreement that a compile time diagnostic should
> be given:
> I think the default behavior, without -std=XXX, should give the
> warning at compile.
> I think that for -std=f95 or -std=f2003, an error should be given at
> compile time.
> At runtime, quiet acceptance for default, there is no runtime for -std=
I'm fine with that solution. How about the following patch?
Build and regression tested on x86-64-linux.
OK for the trunk?

Tobias
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