Hide cu2qu.cli from --help

Lib/fontTools/cu2qu/__main__.py

@@ -1,5 +1,5 @@
 import sys
-from .cli import main
+from .cli import _main as main
 
 
 if __name__ == "__main__":

Lib/fontTools/cu2qu/cli.py

@@ -64,7 +64,7 @@ def _copytree(input_path, output_path):
     shutil.copytree(input_path, output_path)
 
 
-def main(args=None):
+def _main(args=None):
     """Convert a UFO font from cubic to quadratic curves"""
     parser = argparse.ArgumentParser(prog="cu2qu")
     parser.add_argument("--version", action="version", version=fontTools.__version__)