I use GNU guix in pt_BR and command "guix build -f" always fails
producing error message:

texinfo.scm:92:2: In procedure command-spec:
Throw to key `parser-error' with args `(#f "Unknown command" exemplo)'.

The error disappears if I change the language of my system. Checking
the localization files, I found that the pt_BR translation had some
problems in the texinfo file: some translator incorrectly translated
the name of some commands (eg. @example to @exemplo). Checking the
entire file, I identified 3 mistakes of this kind and I am sending the
patch as attachment.

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Thiago  Leucz Astrizi