Before, po/pl.po had these statistics:
441 translated messages, 713 fuzzy translations, 627 untranslated
messages.
Afterwards, the statistics for po/pl.po is:
666 translated messages, 882 fuzzy translations, 919 untranslated
messages.
The number of translated messages changed from 25% to 27%.
With this change, it becomes important to use the latest version of
mdbook-i18n-helpers when viewing the translation locally. To update to
the latest version, run
cargo install mdbook-i18n-helpers
You will now be able to serve the translation locally.
Part of #330.
