.__int__() has never been used. Drop it.
.decrease() raises ArithmeticError when asked to decrease indentation
level below zero. Nothing catches it. It's a programming error.
Dumb down to assert.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20210908045428.2689093-4-armbru@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
e2ff14a574