convert classdef to allow for metaclass on rhs of assign

Matlab.tmbundle/Syntaxes/MATLAB.tmLanguage

@@ -831,41 +831,16 @@
 													<string>true|false</string>
 												</dict>
 												<dict>
+													<key>comment</key>
+													<string>Metadata query for class properties</string>
 													<key>name</key>
-													<string>meta.metaclass.matlab</string>
-													<key>begin</key>
-													<string>(\?)</string>
-													<key>beginCaptures</key>
-													<dict>
-														<key>1</key>
-														<dict>
-															<key>name</key>
-															<string>keyword.operator.other.question.matlab</string>
-														</dict>
-													</dict>
-													<key>end</key>
-													<string>(?=\)|,)</string>
-													<key>patterns</key>
-													<array>
-														<dict>
-															<key>name</key>
-															<string>entity.other.class.matlab</string>
-															<key>match</key>
-															<string>(?&lt;=[\s.&lt;])[a-zA-Z][a-zA-Z0-9_]*(?=\s|,|\))</string>
-														</dict>
-														<dict>
-															<key>name</key>
-															<string>entity.name.namespace.matlab</string>
-															<key>match</key>
-															<string>[a-zA-Z][a-zA-Z0-9_]*</string>
-														</dict>
-														<dict>
-															<key>name</key>
-															<string>punctuation.accessor.dot.matlab</string>
-															<key>match</key>
-															<string>\.</string>
-														</dict>
-													</array>
+													<string>keyword.operator.other.question.matlab</string>
+													<key>match</key>
+													<string>(?&lt;!\w)\?(?=\w)</string>
+												</dict>
+												<dict>
+													<key>include</key>
+													<string>#metaclass_literal</string>
 												</dict>
 												<dict>
 													<key>include</key>