This was done with
python ../lyx-2.3-staging/development/tools/mergepo.py -n -t po ../lyx-2.1/po
It should have been part of a26cdcb4ba, but the mergepo script did not overwrite
fuzzy translations with non-fuzzy ones at that time. Now 2.2 will not be missing
translations that are in 2.1 (but of course it might contain changed translations).
This is a complete remerge of strings (done with cmake) except for fr.po and
sv.po. Those files had already been remerged after the last string changes,
but they use a different sorting, so I did not want to produce an unneeded
diff.
The differences in the comment lines are a well known problem we have: The
last remerge was done on windows, mine was done on linux.
The translations have been merged by calling
python development/tools/mergepo.py -n ../lyx-2.1-git/po
cd po; make update-gmo
For some languages it may make sense to merge also changed translations,
but this neds to be decided by the individual translators.