rlib/test/test_rstring.py

../_pytest/python.py:611: in _importtestmodule
    mod = self.fspath.pyimport(ensuresyspath=importmode)
../py/_path/local.py:650: in pyimport
    __import__(modname)
E     File "/build_dir/rpython-linux-aarch64/build/rpython/rlib/test/test_rstring.py", line 408
E   SyntaxError: Non-ASCII character '\xc4' in file /build_dir/rpython-linux-aarch64/build/rpython/rlib/test/test_rstring.py on line 408, but no encoding declared; see http://python.org/dev/peps/pep-0263/ for details
 (somefailed=True in rlib/test/test_rstring.py)

builder: rpython-linux-aarch64 build #556+

test: rlib/test/test_rstring.py