Merge pull request #8339 from takluyver/ascii-completions-test-cwd

Make ascii completion test ignore local files

IPython/core/tests/test_completer.py

@@ -179,10 +179,11 b' def test_forward_unicode_completion():'
 @dec.onlyif(sys.version_info[0] >= 3, 'This test only apply on python3')
 def test_no_ascii_back_completion():
     ip = get_ipython()
+    with TemporaryWorkingDirectory():  # Avoid any filename completions
     # single ascii letter that don't have yet completions
     for letter in 'fjqyJMQVWY' :
         name, matches = ip.complete('\\'+letter)
-        nt.assert_equal(len(matches), 0)
+            nt.assert_equal(matches, [])