@span .sh-cmt {-# If you aren’t a shell-guru, take a moment to figure out how this works!}
$ @span .sh-fn {-ls} *.[ch] | @span .sh-fn {-sed} @span .sh-str {-'p; s/[A-Z]/‌\\L_&/g'} | @span .sh-fn {-xargs} -L2 mv