MDLSITE-6594 Enforce operator whitespace rules

Co-authored-by: Eloy Lafuente (stronk7) <stronk7@moodle.org>

Author: junpataleta

moodle/ruleset.xml

@@ -73,6 +73,7 @@
     <rule ref="Squiz.WhiteSpace.OperatorSpacing">
         <properties>
             <property name="ignoreNewlines" value="true"/>
+            <property name="ignoreSpacingBeforeAssignments" value="false" />
         </properties>
     </rule>
     <rule ref="Squiz.WhiteSpace.ObjectOperatorSpacing">