maint: Add encoding marker for Emacs to non-ASCII sources.
Similar to commit
f406941a8a2ec5fbf3eacc386b9be09d6593d53b
from Paul Eggert <eggert@cs.ucla.edu> 2015-09-24.
To determine the file list that need the marker, I used the command:
for f in `find . -type f | grep -v '^\./\.git/' | grep -v '^\./tests/'`; do
if iconv -f ASCII -t ASCII < $f > /dev/null 2>&1 ; then : ; else
if iconv -f UTF-8 -t UTF-8 < $f > /dev/null 2>&1 ; then
if grep 'The GNU C Library is' $f > /dev/null; then :; else
if grep 'coding: utf-8' $f > /dev/null; then :; else
echo $f
fi
fi
fi
fi
done | LC_ALL=C sort