'Build Systems)' fixed.
But I still can't find odd whitespace in guix.ru.texi:946. I need a context.

чт, 9 квіт. 2020 о 12:37 Ludovic Courtès <ludo@gnu.org> пише:
Hi,

I’m really sorry but there’s still one error:

--8<---------------cut here---------------start------------->8---
  MAKEINFO doc/guix.ru.info
./doc/guix.ru.texi:946: warning: accent command `@,' must not be followed by whitespace
./doc/guix.ru.texi:28289: @pxref reference to nonexistent node `Build Systems)'
make[2]: *** [Makefile:4239: doc/guix.ru.info] Error 1
--8<---------------cut here---------------end--------------->8---

There’s an extra closing paren here.

Julien, do you have ideas on how we could improve this workflow?
Perhaps have an automated system that applies the latest PO files and
sends a report to translators?

Ludo’.