SDL: README-migration: Added backticks to avoid markdown highlighting.

From 87c8e2b942108555f36a3ae951de9557a5b41da0 Mon Sep 17 00:00:00 2001
From: "Ryan C. Gordon" <[EMAIL REDACTED]>
Date: Sat, 31 Dec 2022 01:12:10 -0500
Subject: [PATCH] README-migration: Added backticks to avoid markdown
 highlighting.

---
 docs/README-migration.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/docs/README-migration.md b/docs/README-migration.md
index 655e5b79fc5c..8fb141428ab4 100644
--- a/docs/README-migration.md
+++ b/docs/README-migration.md
@@ -432,7 +432,7 @@ The following functions have been renamed:
 
 ## SDL_platform.h
 
-The preprocessor symbol __MACOSX__ has been renamed __MACOS__, and __IPHONEOS__ has been renamed __IOS__
+The preprocessor symbol `__MACOSX__` has been renamed `__MACOS__`, and `__IPHONEOS__` has been renamed `__IOS__`
 
 ## SDL_rect.h