SDL: Added "--substring" to the help for rename_symbols.py

SDL Commits
1 
From c2a3112b6f4b333762900824afc1b339ff5960e3 Mon Sep 17 00:00:00 2001
From: Sam Lantinga <[EMAIL REDACTED]>
Date: Mon, 23 Oct 2023 08:36:05 -0700
Subject: [PATCH] Added "--substring" to the help for rename_symbols.py

---
 build-scripts/rename_symbols.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/build-scripts/rename_symbols.py b/build-scripts/rename_symbols.py
index d6cf879e17f2..33a92dde042c 100755
--- a/build-scripts/rename_symbols.py
+++ b/build-scripts/rename_symbols.py
@@ -25,7 +25,7 @@ def main():
 
     else:
         if len(args.args) < 3:
-            print("Usage: %s oldname newname files_or_directories ..." % sys.argv[0])
+            print("Usage: %s [--substring] oldname newname files_or_directories ..." % sys.argv[0])
             exit(1)
 
         replacements = { args.args[0]: args.args[1] }