Akim Demaille 4d34b06fb3 diagnostics: use gnulib's libtextstyle-optional ...

Bruno Haible just added a default implementation of libtextstyle's
interface when the library is not available.
https://lists.gnu.org/archive/html/bison-patches/2019-03/msg00025.html

* gnulib: Update.
* bootstrap.conf: Replace libtextstyle with libtextstyle-optional.
* src/complain.c, src/getargs.c: Remove now useless cpp guards.

2019-03-24 18:40:46 +01:00

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