CSV macro does not work with Python 3

[roger.oberholtzer@…]

when trying to display something like this:

{{{
#!CSV
123	123	123	123
234	234	234	234
}}}

I get this error:

Error: Processor CSV failed

initial_value must be str or None, not bytes

This is with Trac 1.5.4 and Python 3.11

[Jun Omae]

In 18581:

CsvMacro: make compatible with Trac 1.4/1.6 and Python 3 (closes #14252, #14151)