Minor doc/comment changes.
Add "Sub::Inspector" to cpanfile recommendations
t/runtests.zsh - add "-n -f" options to cpanm.
Change min/install.sh to stop when cpanm is not available.
Improve some diag output for syntax error more informative.
Adapt perl5212delta - To suppress "redundant" warning for sprintf
Adapt perl5214delta - that is diag message enhancement: (did you forget to declare "my ...")