Rollup merge of rust-lang#54708 - collin5:b49475, r=Mark-Simulacrum

Make ./x.py help <cmd> invoke ./x.py <cmd> -h on its own

Fixes rust-lang#49475

r? @Mark-Simulacrum

src/bootstrap/bootstrap.py

@@ -844,6 +844,11 @@ def bootstrap(help_triggered):
 def main():
     """Entry point for the bootstrap process"""
     start_time = time()
+
+    # x.py help <cmd> ...
+    if len(sys.argv) > 1 and sys.argv[1] == 'help':
+        sys.argv = sys.argv[:1] + [sys.argv[2], '-h'] + sys.argv[3:]
+
     help_triggered = (
         '-h' in sys.argv) or ('--help' in sys.argv) or (len(sys.argv) == 1)
     try: