Fixed a unit test which was failing on Windows

Also fixed a 2nd unrelated unit test which sometimes failed on Windows, depending on what tools were installed or not.

Author: tleonhardt

tests/test_cmd2.py

@@ -751,7 +751,7 @@ def test_edit_file_with_spaces(base_app, request, monkeypatch):
     test_dir = os.path.dirname(request.module.__file__)
     filename = os.path.join(test_dir, 'my commands.txt')
 
-    run_cmd(base_app, 'edit {!r}'.format(filename))
+    run_cmd(base_app, 'edit "{}"'.format(filename))
 
     # We think we have an editor, so should expect a system call
     m.assert_called_once_with('"{}" "{}"'.format(base_app.editor, filename))
@@ -911,7 +911,10 @@ def test_default_to_shell_unknown(shell_app):
 def test_default_to_shell_good(capsys):
     app = cmd2.Cmd()
     app.default_to_shell = True
-    line = 'ls'
+    if sys.platform.startswith('win'):
+        line = 'dir'
+    else:
+        line = 'ls'
     statement = app.parser_manager.parsed(line)
     retval = app.default(statement)
     assert not retval