[RFA 01/12] Introduce string_vprintf

[Pedro Alves]

On 09/28/2017 08:50 PM, Tom Tromey wrote:
> This adds string_vprintf, a va_list variant of string_printf.  This
> will be used in later patches.

Thanks.

This is OK, but IWBN to add some unittest to
gdb/unittests/utils-selftests.c.

Thanks,
Pedro Alves