Deleted an unused method and updated a method comment

Author: tleonhardt

CHANGELOG.md

@@ -1,7 +1,8 @@
-## 4.0.0 (TBD)
+## 4.0.0 (TBD, 2026)
 
-- Breaking Changes
+- Potentially Breaking Changes
     - `cmd2` no longer has a dependency on `cmd` and `cmd2.Cmd` no longer inherits from `cmd.Cmd`
+        - We don't _think_ this should impact users, but there is theoretically a possibility
 
 ## 3.0.0 (December 7, 2025)
 

cmd2/cmd2.py

@@ -3314,16 +3314,12 @@ def default(self, statement: Statement) -> bool | None:  # type: ignore[override
     def completedefault(self, *_ignored: list[str]) -> list[str]:
         """Call to complete an input line when no command-specific complete_*() method is available.
 
-        By default, it returns an empty list.
+        This method is only called for non-argparse-based commands.
 
+        By default, it returns an empty list.
         """
         return []
 
-    def completenames(self, text: str, *_ignored: list[str]) -> list[str]:
-        """Help provide tab-completion options for command names."""
-        dotext = 'do_' + text
-        return [a[3:] for a in self.get_names() if a.startswith(dotext)]
-
     def _suggest_similar_command(self, command: str) -> str | None:
         return suggest_similar(command, self.get_visible_commands())
 

tests/test_completion.py

@@ -224,7 +224,7 @@ def test_cmd2_command_completion_single(cmd2_app) -> None:
     line = text
     endidx = len(line)
     begidx = endidx - len(text)
-    assert cmd2_app.completenames(text, line, begidx, endidx) == ['help']
+    assert cmd2_app.basic_complete(text, line, begidx, endidx, cmd2_app.get_all_commands()) == ['help']
 
 
 def test_complete_command_single(cmd2_app) -> None:
@@ -322,15 +322,15 @@ def test_cmd2_command_completion_multiple(cmd2_app) -> None:
     line = text
     endidx = len(line)
     begidx = endidx - len(text)
-    assert cmd2_app.completenames(text, line, begidx, endidx) == ['help', 'history']
+    assert cmd2_app.basic_complete(text, line, begidx, endidx, cmd2_app.get_all_commands()) == ['help', 'history']
 
 
 def test_cmd2_command_completion_nomatch(cmd2_app) -> None:
     text = 'fakecommand'
     line = text
     endidx = len(line)
     begidx = endidx - len(text)
-    assert cmd2_app.completenames(text, line, begidx, endidx) == []
+    assert cmd2_app.basic_complete(text, line, begidx, endidx, cmd2_app.get_all_commands()) == []
 
 
 def test_cmd2_help_completion_single(cmd2_app) -> None: