On Thu, Nov 10, 2022 at 3:07 PM Ray Andrews <rayandrews@xxxxxxxxxxx> wrote: > > Yabut MBEGIN and MEND are showing values that are never explicitly set, > they are showing some internal workings surely? They are set by the (#m) operator in ${cc//(#m).../...} ... try looking those names up in the manual page, hmm?