10.3 Diversion numbers

The current diversion is tracked by the builtin divnum:

Builtin: divnum

Expands to the number of the current diversion.

Initial divnum
⇒Initial 0
divert(`1')
Diversion one: divnum
divert(`2')
Diversion two: divnum
^D
⇒
⇒Diversion one: 1
⇒
⇒Diversion two: 2