test: fix help docs test by adding _import_module to fake kernel

tests/test_help_docs.py

@@ -1,29 +1,26 @@
 from __future__ import annotations
 
+import importlib
 from types import SimpleNamespace
 
 from trushell.commands.core import run_help
 
 
 def test_run_help_prints_docstring_for_known_command(monkeypatch, capsys):
+    def _fake_import_module(path: str):
+        module = importlib.import_module(path.replace("/", ".").removesuffix(".py"))
+        return module
+
     fake_kernel = SimpleNamespace(
         registry={
             "settings": {
                 "path": "trushell/commands/settings.py",
                 "function": "run_settings",
             }
-        }
+        },
+        _import_module=_fake_import_module,
     )
 
-    # Provide a minimal module object with the expected function and
-    # docstring so `run_help()` can import and print the docstring.
-    def run_settings():
-        """Launch the TruShell settings TUI."""
-        return None
-
-    fake_module = SimpleNamespace(run_settings=run_settings)
-    fake_kernel._import_module = lambda path: fake_module
-
     monkeypatch.setattr("trushell.core.trukernel.get_kernel", lambda: fake_kernel)
 
     run_help("settings")

trushell/cli.py

@@ -29,9 +29,6 @@ def app_with_lower() -> None:
     if len(sys.argv) > 1:
         argv_copy = sys.argv.copy()
         if argv_copy[1].lower() not in {"--help", "-h", "version"}:
-            # Normalize the command name to lowercase for case-insensitive
-            # invocation, but preserve the case of subsequent arguments
-            # (e.g., filenames) which may be case-sensitive.
             first = argv_copy[1].lower()
             rest = argv_copy[2:]
             raw = " ".join([first] + rest)