[PATCH v3] Add tests for the long double version of ecvt and fcvt

[Florian Weimer]

* Gabriel F. T. Gomes:

> 	* misc/tst-efgcvt-template.c: Renamed from misc/tst-efgcvt.c.

I think you should add a file comment with a brief list of all the
customization macros.

Do you expect NAME to be customizable in the future?

Thanks,
Florian