No longer treating empty text scripts as an error condition

Author: kmvanbrunt

cmd2/cmd2.py

@@ -3790,9 +3790,8 @@ def do_run_script(self, args: argparse.Namespace) -> Optional[bool]:
             self.perror("'{}' is not a file".format(expanded_path))
             return
 
-        # Make sure the file is not empty
+        # An empty file is not an error, so just return
         if os.path.getsize(expanded_path) == 0:
-            self.perror("'{}' is empty".format(expanded_path))
             return
 
         # Make sure the file is ASCII or UTF-8 encoded text

tests/test_cmd2.py

@@ -318,7 +318,7 @@ def test_run_script_with_empty_file(base_app, request):
     test_dir = os.path.dirname(request.module.__file__)
     filename = os.path.join(test_dir, 'scripts', 'empty.txt')
     out, err = run_cmd(base_app, 'run_script {}'.format(filename))
-    assert "is empty" in err[0]
+    assert not out and not err
 
 def test_run_script_with_binary_file(base_app, request):
     test_dir = os.path.dirname(request.module.__file__)