SDL: docs: Don't let Doxygen expand HOME environment variable

From 0c7c4bfcf920cfc5d66b0a7054a53904c668ef8f Mon Sep 17 00:00:00 2001
From: Simon McVittie <[EMAIL REDACTED]>
Date: Tue, 30 Nov 2021 23:15:03 +0000
Subject: [PATCH] docs: Don't let Doxygen expand HOME environment variable

Otherwise, the API documentation will encode the home directory of the
user or autobuilder that built SDL, instead of telling the user to use
the literal string $(HOME) as intended.

See also <https://github.com/doxygen/doxygen/issues/7073>.

Signed-off-by: Simon McVittie <smcv@debian.org>
---
 docs/README-macos.md | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/docs/README-macos.md b/docs/README-macos.md
index 67c53e2372..9d2c6a921a 100644
--- a/docs/README-macos.md
+++ b/docs/README-macos.md
@@ -239,8 +239,8 @@ Some of you won't want to use the Stationary so I'll give some tips:
 * Remove "main.m" from your project
 * Remove "MainMenu.xib" from your project
 * Remove "AppDelegates.*" from your project
-* Add "$(HOME)/Library/Frameworks/SDL.framework/Headers" to include path
-* Add "$(HOME)/Library/Frameworks" to the frameworks search path
+* Add "\$(HOME)/Library/Frameworks/SDL.framework/Headers" to include path
+* Add "\$(HOME)/Library/Frameworks" to the frameworks search path
 * Add "-framework SDL -framework Foundation -framework AppKit" to "OTHER_LDFLAGS"
 * Add your files
 * Clean and build