Changed error messages

Author: kmvanbrunt

cmd2/cmd2.py

@@ -2396,7 +2396,7 @@ def _alias_delete(self, args: argparse.Namespace) -> None:
             self.aliases.clear()
             self.poutput("All aliases deleted")
         elif not args.name:
-            self.do_help('alias delete')
+            self.perror("Either --all or alias name(s) must be specified")
         else:
             for cur_name in utils.remove_duplicates(args.name):
                 if cur_name in self.aliases:
@@ -2576,7 +2576,7 @@ def _macro_delete(self, args: argparse.Namespace) -> None:
             self.macros.clear()
             self.poutput("All macros deleted")
         elif not args.name:
-            self.do_help('macro delete')
+            self.perror("Either --all or macro name(s) must be specified")
         else:
             for cur_name in utils.remove_duplicates(args.name):
                 if cur_name in self.macros:

tests/test_cmd2.py

@@ -1617,7 +1617,7 @@ def test_alias_delete_non_existing(base_app):
 
 def test_alias_delete_no_name(base_app):
     out, err = run_cmd(base_app, 'alias delete')
-    assert "Usage: alias delete" in out[0]
+    assert "Either --all or alias name(s)" in err[0]
 
 def test_multiple_aliases(base_app):
     alias1 = 'h1'
@@ -1768,7 +1768,7 @@ def test_macro_delete_non_existing(base_app):
 
 def test_macro_delete_no_name(base_app):
     out, err = run_cmd(base_app, 'macro delete')
-    assert "Usage: macro delete" in out[0]
+    assert "Either --all or macro name(s)" in err[0]
 
 def test_multiple_macros(base_app):
     macro1 = 'h1'