def assert_contains_lines(self, lines2):
__tracebackhide__ = True<EOL>val = self.stringio.getvalue()<EOL>self.stringio.truncate(<NUM_LIT:0>)<EOL>self.stringio.seek(<NUM_LIT:0>)<EOL>lines1 = val.split("<STR_LIT:\n>")<EOL>return LineMatcher(lines1).fnmatch_lines(lines2)<EOL>
Assert that lines2 are contained (linearly) in lines1.

        Return a list of extralines found.