Use deterministic order of hole arguments

Author: nicolasstucki

compiler/src/dotty/tools/dotc/transform/Splicing.scala

@@ -189,8 +189,8 @@ class Splicing extends MacroTransform:
    *  ```
    */
   private class SpliceTransformer(spliceOwner: Symbol, isCaptured: Symbol => Boolean) extends Transformer:
-    private val typeBindingMap = mutable.Map.empty[Symbol, (Tree, Symbol)]
-    private val termBindingMap = mutable.Map.empty[Symbol, (Tree, Symbol)]
+    private val typeBindingMap = mutable.LinkedHashMap.empty[Symbol, (Tree, Symbol)]
+    private val termBindingMap = mutable.LinkedHashMap.empty[Symbol, (Tree, Symbol)]
     /** Reference to the `Quotes` instance of the current level 1 splice */
     private var quotes: Tree | Null = null // TODO: add to the context
     private var healedTypes: QuoteTypeTags | Null = null // TODO: add to the context