Supported nested invocations; handled unusable values when deducing attributes.
Refuse to produce guards without any usable deductions.
syspython-as-target
1#!/usr/bin/env python 2 3""" 4A minimal program. The docstring is not considered as part of the program 5content. 6""" 7 8"This string introduces some content." 9 10# vim: tabstop=4 expandtab shiftwidth=4