Newly added IBM865 charset (for Norwegian) can also be used for Danish
By the way, I fixed `script/charsets/ibm865.py` as Danish uses the 'da'
ISO 639-1 code by the way, not 'dk' (which is sometimes used for other
codes for Denmark, such as ISO 3166 country code and internet TLD) but
not for the language itself.
For the test, adding some text from the top article of the day on the
Danish Wikipedia, which was about Jimi Hendrix. And that's cool! 🎸 ;-)
Not sure if it is in the C++ standard, or was, but apparently some
compilers may complain when files don't end with a newline (though
neither GCC nor Clang as our CI and my local builds are fine).
So here are all our generated source which didn't have such ending
newline (hopefully I forgot none). I just loaded them in my vim editor,
and resaved them. This was enough to add an ending newline.
