correct copy-paste note after refactorings

Author: erik-krogh

javascript/ql/src/semmle/javascript/Promises.qll

@@ -469,7 +469,6 @@ private module AsyncReturnSteps {
    * A data-flow step for ordinary and exceptional returns from async functions.
    */
   private class AsyncReturn extends PreCallGraphStep {
-    // Note: partially copy-paste from FlowSteps::CachedSteps::returnStep/2
     override predicate storeStep(DataFlow::Node pred, DataFlow::SourceNode succ, string prop) {
       exists(DataFlow::FunctionNode f | f.getFunction().isAsync() |
         // ordinary return
@@ -478,6 +477,7 @@ private module AsyncReturnSteps {
         succ = f.getReturnNode()
         or
         // exceptional return
+        // Note: partially copy-paste from FlowSteps::localExceptionStep/2
         prop = errorProp() and
         exists(Expr expr |
           expr = any(ThrowStmt throw).getExpr() and

javascript/ql/src/semmle/javascript/dataflow/internal/FlowSteps.qll

@@ -61,6 +61,7 @@ predicate localFlowStep(
  * Holds if an exception thrown from `pred` can propagate locally to `succ`.
  */
 predicate localExceptionStep(DataFlow::Node pred, DataFlow::Node succ) {
+  // Note: FlowSteps::localExceptionStep/2 has copy-paste children
   exists(Expr expr |
     expr = any(ThrowStmt throw).getExpr() and
     pred = expr.flow()
@@ -220,7 +221,6 @@ private module CachedSteps {
    */
   cached
   predicate returnStep(DataFlow::Node pred, DataFlow::Node succ) {
-    // Note: FlowSteps::CachedSteps::returnStep/2 has copy-paste children
     exists(Function f | calls(succ, f) or callsBound(succ, f, _) |
       DataFlow::functionReturnNode(pred, f)
       or