cli: Update code for clap v4

e2e_tests/helpers.py

@@ -28,7 +28,7 @@ def get_temporary_directory(dir=None):
 def grm(args, cwd=None, is_invalid=False):
     cmd = subprocess.run([binary] + args, cwd=cwd, capture_output=True, text=True)
     if not is_invalid:
-        assert "USAGE" not in cmd.stderr
+        assert "usage" not in cmd.stderr.lower()
     print(f"grmcmd: {args}")
     print(f"stdout:\n{cmd.stdout}")
     print(f"stderr:\n{cmd.stderr}")

e2e_tests/test_basic.py

@@ -5,9 +5,9 @@ from helpers import *
 
 def test_invalid_command():
     cmd = grm(["whatever"], is_invalid=True)
-    assert "USAGE" in cmd.stderr
+    assert "usage" in cmd.stderr.lower()
 
 
 def test_help():
     cmd = grm(["--help"])
-    assert "USAGE" in cmd.stdout
+    assert "usage" in cmd.stdout.lower()