--- a/Ruby.tmbundle/Syntaxes/Ruby.plist	2009-01-04 19:36:24.000000000 +0100
+++ b/Ruby.tmbundle/Syntaxes/Ruby.plist	2009-01-21 17:37:00.000000000 +0100
@@ -551,7 +553,7 @@
 		</dict>
 		<dict>
 			<key>match</key>
-			<string>&lt;&lt;=|%=|&amp;=|\*=|\*\*=|\+=|\-=|\^=|\|{1,2}=|/=|&lt;&lt;</string>
+			<string>&lt;&lt;=|%=|&amp;=|\*=|\*\*=|\+=|\-=|\^=|\|{1,2}=|/=|&lt;&lt;(?!-)</string>
 			<key>name</key>
 			<string>keyword.operator.assignment.augmented.ruby</string>
 		</dict>