(maint) Add parentheses in function calls

These tests were missing paretheses around arguments in calls.
(#22498) Stop future parser from interpreting 0 as 00 (octal 0).

The rule for determening radix interpreted '0' as an octal number.
When transforming it to a String it became '00'.

This changes the octal recognition to make '0' be interpreted as
being decimal.

Tests checks that '0' and '00' both work.