From 0d03b6df7d3be7198e1a6929cad52be05d4f0a07 Mon Sep 17 00:00:00 2001
From: Heigh Tech LLC <heigh-tech@heigh-tech.com>
Date: Wed, 16 Mar 2011 06:47:36 +0800
Subject: [PATCH] add backtick string and instance variable rules

---
 lib/ace/mode/ruby_highlight_rules.js | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/lib/ace/mode/ruby_highlight_rules.js b/lib/ace/mode/ruby_highlight_rules.js
index 0eedb3eb..d117d2a6 100644
--- a/lib/ace/mode/ruby_highlight_rules.js
+++ b/lib/ace/mode/ruby_highlight_rules.js
@@ -99,8 +99,14 @@ var RubyHighlightRules = function() {
                 token : "string", // single line
                 regex : "['](?:(?:\\\\.)|(?:[^'\\\\]))*?[']"
 	        }, {
-                token: "string", // symbol
-                regex: "[:](?:[a-zA-Z]|\d)+"
+                token : "string", // backtick string
+                regex : "[`](?:(?:\\\\.)|(?:[^'\\\\]))*?[`]"
+	        }, {
+                token : "variable.instancce", // instance variable
+                regex : "@{1,2}(?:[a-zA-Z]|\d)+"
+	        }, {
+                token : "string", // symbol
+                regex : "[:](?:[a-zA-Z]|\d)+"
 	        }, {
 	            token : "constant.numeric", // hex
 	            regex : "0[xX][0-9a-fA-F]+\\b"