dwarf.d: remove spurious trailing comma

[WalterBright]

Bad style exploiting what appears to be a bug in the D front end.

[dlang-bot]

Thanks for your pull request, @WalterBright!

Bugzilla references

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Testing this PR locally

If you don't have a local development environment setup, you can use Digger to test this PR:

dub run digger -- build "master + druntime#3498"

[WalterBright]

std/stdio.d(299): Error: undefined identifier `flockfile` in module `core.sys.posix.stdio`

What the heck? That has nothing to do with this trivial PR.

[wilzbach]

It's not a bug, it's a feature.

[WalterBright]

If it's used exactly once, it's not much of a feature.

[CyberShadow]

More uses here: dlang/dmd#12684 (comment)

[thewilsonator]

This might be bad style for just two arguments, but as noted this is a feature not a bug.
It has the same use as trailing comma for enum declarations.

[thewilsonator]

What the heck? That has nothing to do with this trivial PR.

How many commits between trailingComma~1 and dlang/master? Maybe try rebasing?

[Geod24]

Not an oversight, very much on purpose, as there is another usage of it in the commit that introduced it:
f653441#diff-1b94c982760aac40515b2b539895bf36e83f45159711f983f09290277a996587R91-R96

And we established it's not a bug, but a feature introduced 10 years ago as a fix to issue 2477.

[DoctorNoobingstoneIPresume]

FWMOIW (For Whatever My Opinion Is Worth):

This feature makes it easier to write some code-generating (mixin) code.

Also: If code is indented like this:

f
(
    very-long-arg-1,
    not-long-but-anyway-similarly-indented-arg-2,
    very-long-arg-3,
);

then that trailing comma ensures we can add very-long-arg-4 without affecting the (git blame etc.) history of the very-long-arg-3 line.

I love this bug^H^H^Hfeature.

Therefore, I vote against removing code which (even accidentally) exploits the feature. Otherwise, others (including @WalterBright) might remove the ahem bug and actually get away with it !

[Geod24]

The DMD PR has been closed, so closing this too.