Fix formatting, add a comment, and call attention to what is causing the

message "Continue holding ZZ to give up".

stepmania/src/FontCharAliases.cpp

@@ -29,6 +29,10 @@ static map<RString,RString> CharAliasRepl;
  * text to disk, we need to write placeholders (&doublezeta;) for them, and never
  * Unicode characters, since the codepoint is prone to change.  We can't currently
  * write &these; to SMs, due to format limitations.
+ *
+ * Internal use glyphs should ONLY go in the section marked "internal use", or there
+ * will be hard-to-debug conflicts like the "doublezeta" vs. "back" conflict that
+ * no one bothered to fix for several months.
  */
 
 /* Here's a copy-and-paste for a basic Japanese font page:
@@ -276,8 +280,6 @@ static void InitCharAliases()
 		{ "uparrow",	0x2191 }, /* ↑ */
 		{ "rightarrow",	0x2192 }, /* → */
 		{ "downarrow",	0x2193 }, /* ↓ */
-		{ "doublezeta",	0xE009 },
-		{ "planet",		0xE00A },
 		{ "4thnote",	0x2669 }, /* ♩ */
 		{ "8thnote",	0x266A }, /* ♪ */
 		{ "b8thnote",	0x266B }, /* ♫ */
@@ -296,6 +298,8 @@ static void InitCharAliases()
 		{ "menuleft",	0xE006 },
 		{ "menuright",	0xE007 },
 		{ "start",	0xE008 },
+		{ "doublezeta",	0xE009 },
+		{ "planet",	0xE00A },
 		{ "back",	0xE009 },
 		{ "ok",		0xE00A },
 		{ "nextrow",	0xE00B },