--- a/tests/test-run-tests.py	Sat Oct 05 10:29:34 2019 -0400
+++ b/tests/test-run-tests.py	Sun Oct 06 09:45:02 2019 -0400
@@ -8,11 +8,13 @@
 import doctest
 import os
 import re
+
 # this is hack to make sure no escape characters are inserted into the output
 if 'TERM' in os.environ:
     del os.environ['TERM']
 run_tests = __import__('run-tests')
 
+
 def prn(ex):
     m = ex.args[0]
     if isinstance(m, str):
@@ -20,6 +22,7 @@
     else:
         print(m.decode('utf-8'))
 
+
 def lm(expected, output):
     r"""check if output matches expected
 
@@ -35,10 +38,12 @@
         ... except AssertionError as ex: prn(ex)
         single backslash or unknown char
     """
-    assert (expected.endswith(b'\n')
-            and output.endswith(b'\n')), 'missing newline'
-    assert not re.search(br'[^ \w\\/\r\n()*?]', expected + output), (
-           b'single backslash or unknown char')
+    assert expected.endswith(b'\n') and output.endswith(
+        b'\n'
+    ), 'missing newline'
+    assert not re.search(
+        br'[^ \w\\/\r\n()*?]', expected + output
+    ), b'single backslash or unknown char'
     test = run_tests.TTest(b'test-run-test.t', b'.', b'.')
     match, exact = test.linematch(expected, output)
     if isinstance(match, str):
@@ -46,7 +51,8 @@
     elif isinstance(match, bytes):
         return 'special: ' + match.decode('utf-8')
     else:
-        return bool(match) # do not return match object
+        return bool(match)  # do not return match object
+
 
 def wintests():
     r"""test matching like running on windows
@@ -77,6 +83,7 @@
     """
     pass
 
+
 def otherostests():
     r"""test matching like running on non-windows os
 
@@ -104,5 +111,6 @@
     """
     pass
 
+
 if __name__ == '__main__':
     doctest.testmod()