Differences to the ca.po file from the Translation Project:
- An overlong line translating --filters-help was wrapped.
- "make update-po" was used to remove line numbers from the comments
to match the changes in fccebe2b4fd513488fc920e4dac32562ed3c7637
and 093490b58271e9424ce38a7b1b38bcf61b9c86c6. xz.pot in the TP
is older than these commits.