Ævar Arnfjörð Bjarmason <avarab@xxxxxxxxx> writes: >> +if test -n "$missing_prereq" >> +then >> + unique_missing_prereq=$( >> + echo $missing_prereq | >> + tr -s "," "\n" | >> + grep -v '^$' | >> + sort -u | >> + paste -s -d ',') > > What is paste? Some out-of-tree debugging utility? https://pubs.opengroup.org/onlinepubs/9699919799/utilities/paste.html Don't feel bad for not knowing it. I usually do not use cut or paste myself and I had to look it up the other day while reviewing the RFC phase of this series. I am not sure '\n' is a good idea from portability perspective. I thought I wrote '\012' in the illustration in my review?