[PATCH v3 1/3] Add tests for argp_error and argp_failure with floating-point parameters

[Florian Weimer]

* Gabriel F. T. Gomes:

> 	* argp/Makefile: (tests): Add tst-ldbl-argp.
> 	* argp/tst-ldbl-argp.c: New file.

This looks okay to me.  I'll look into adding TEST_COMPARE_STRING, but
this should not block you.

Thanks,
Florian