Replace usage of parser.suite with ast.parse
Replaced usage of the long-superseded "parser.suite" module in the
mako.util package for parsing the python magic encoding comment with the
"ast.parse" function introduced many years ago in Python 2.5, as
"parser.suite" is emitting deprecation warnings in Python 3.9.
Additionally repair two error-detection unit tests that were using a
"print" statement despite the tests running under Python 3; while the
tests were passing they were no longer testing the right thing.
Fixes: #310
Change-Id: Id436e2c6620438ef16b3f188b989233c82972b29
4 files changed
