Fixed bug where items tab completed in set were not current

Author: kmvanbrunt

cmd2/cmd2.py

@@ -1604,13 +1604,17 @@ def get_visible_commands(self) -> List[str]:
         return commands
 
     def get_alias_names(self) -> List[str]:
-        """Return a list of alias names."""
+        """Return list of current alias names"""
         return list(self.aliases)
 
     def get_macro_names(self) -> List[str]:
-        """Return a list of macro names."""
+        """Return list of current macro names"""
         return list(self.macros)
 
+    def get_settable_names(self) -> List[str]:
+        """Return list of current settable names"""
+        return list(self.settable)
+
     def get_commands_aliases_and_macros_for_completion(self) -> List[str]:
         """Return a list of visible commands, aliases, and macros for tab completion"""
         visible_commands = set(self.get_visible_commands())
@@ -2837,7 +2841,7 @@ def show(self, args: argparse.Namespace, parameter: str='') -> None:
     set_parser.add_argument('-a', '--all', action='store_true', help='display read-only settings as well')
     set_parser.add_argument('-l', '--long', action='store_true', help='describe function of parameter')
     setattr(set_parser.add_argument('param', nargs='?', help='parameter to set or view'),
-            ACTION_ARG_CHOICES, settable)
+            ACTION_ARG_CHOICES, get_settable_names)
     set_parser.add_argument('value', nargs='?', help='the new value for settable')
 
     @with_argparser(set_parser)