Modified regex for text string to handle escaped characters.

Author: Samuel Tatasurya

yara/syntaxes/yara.tmLanguage

@@ -228,7 +228,7 @@
 			<key>name</key>
 			<string>string.quoted.double.yara</string>
 			<key>match</key>
-			<string>\".*?\"</string>
+			<string>\"(\\.|[^\\\"])*?\"</string>
 		</dict>
 		<!-- regexp -->
 		<dict>