Ruby: Update after rebase

Author: hvitved

ruby/ql/lib/codeql/ruby/dataflow/internal/DataFlowPrivate.qll

@@ -333,8 +333,6 @@ module VariableCapture {
       VariableWrite() { v = this.getLhs().getVariable() }
 
       CapturedVariable getVariable() { result = v }
-
-      Expr getSource() { result = this.getRhs() }
     }
 
     class VariableRead extends Expr instanceof CfgNodes::ExprNodes::LocalVariableReadAccessCfgNode {
@@ -371,6 +369,8 @@ module VariableCapture {
     or
     result.(Flow::ExprNode).getExpr() = n.asExpr()
     or
+    result.(Flow::VariableWriteSourceNode).getVariableWrite().getRhs() = n.asExpr()
+    or
     result.(Flow::ExprPostUpdateNode).getExpr() = n.(PostUpdateNode).getPreUpdateNode().asExpr()
     or
     result.(Flow::ParameterNode).getParameter().getParameterNode() = n