First, change "cant" to "can't" manually in m4/nullsort.m4,
since "cant" had 3 replacement options. Then remove "dum"
from the LocalWords lists in doc/*.texi. It was not used.
Finally, perform the remaining changes mechanically using
http://github.com/lyda/misspell-check and
some perl to massage its diagnostics into sed -i commands:
git ls-files|grep -v '\.po$'|misspellings -f -|perl -nl \
-e '/^(.*?)\[(\d+)\]: (\w+) -> "(.*?)"$/ or next;' \
-e '($file,$n,$l,$r)=($1,$2,$3,$4); $q="'\''"; $r=~s/$q/$q\\$q$q/g;'\
-e 'print "sed -i $q${n}s!$l!$r!$q $file"'|bash
