minor, use sys.exit print shorthand

src/gen-use-table.py

diff --git a/src/gen-use-table.py b/src/gen-use-table.py
index 26eb0a5..4845c19 100755
--- a/src/gen-use-table.py
+++ b/src/gen-use-table.py
@@ -14,8 +14,7 @@
 import sys
 
 if len (sys.argv) != 5:
-	print (__doc__, file=sys.stderr)
-	sys.exit (1)
+	sys.exit (__doc__)
 
 BLACKLISTED_BLOCKS = ["Thai", "Lao"]