Try to fix unit tests for Python 3.14

Author: tleonhardt

cmd2/argparse_custom.py

@@ -1252,6 +1252,9 @@ def __init__(
         conflict_handler: str = 'error',
         add_help: bool = True,
         allow_abbrev: bool = True,
+        exit_on_error: bool = True,
+        suggest_on_error: bool = False,
+        color: bool = False,
         *,
         ap_completer_type: Optional[Type['ArgparseCompleter']] = None,
     ) -> None:
@@ -1262,20 +1265,43 @@ def __init__(
                                   behavior on this parser. If this is None or not present, then cmd2 will use
                                   argparse_completer.DEFAULT_AP_COMPLETER when tab completing this parser's arguments
         """
-        super(Cmd2ArgumentParser, self).__init__(
-            prog=prog,
-            usage=usage,
-            description=description,
-            epilog=epilog,
-            parents=parents if parents else [],
-            formatter_class=formatter_class,  # type: ignore[arg-type]
-            prefix_chars=prefix_chars,
-            fromfile_prefix_chars=fromfile_prefix_chars,
-            argument_default=argument_default,
-            conflict_handler=conflict_handler,
-            add_help=add_help,
-            allow_abbrev=allow_abbrev,
-        )
+        # TODO: CHANGE so if Python >= 3.14 new args are passed
+        if sys.version_info[1] >= 14:
+            # Python >= 3.14 so pass new arguments to parent argparse.ArgumentParser class
+            super(Cmd2ArgumentParser, self).__init__(
+                prog=prog,
+                usage=usage,
+                description=description,
+                epilog=epilog,
+                parents=parents if parents else [],
+                formatter_class=formatter_class,  # type: ignore[arg-type]
+                prefix_chars=prefix_chars,
+                fromfile_prefix_chars=fromfile_prefix_chars,
+                argument_default=argument_default,
+                conflict_handler=conflict_handler,
+                add_help=add_help,
+                allow_abbrev=allow_abbrev,
+                exit_on_error=exit_on_error,
+                suggest_on_error=suggest_on_error,
+                color=color,
+            )
+        else:
+            # Python < 3.14, so don't pass new arguments to parent argparse.ArgumentParser class
+            super(Cmd2ArgumentParser, self).__init__(
+                prog=prog,
+                usage=usage,
+                description=description,
+                epilog=epilog,
+                parents=parents if parents else [],
+                formatter_class=formatter_class,  # type: ignore[arg-type]
+                prefix_chars=prefix_chars,
+                fromfile_prefix_chars=fromfile_prefix_chars,
+                argument_default=argument_default,
+                conflict_handler=conflict_handler,
+                add_help=add_help,
+                allow_abbrev=allow_abbrev,
+                exit_on_error=exit_on_error,
+            )
 
         self.set_ap_completer_type(ap_completer_type)  # type: ignore[attr-defined]