Switch to (using Context) in more files in typer

Author: odersky

compiler/src/dotty/tools/dotc/typer/Applications.scala

@@ -834,7 +834,7 @@ trait Applications extends Compatibility {
   def typedApply(tree: untpd.Apply, pt: Type)(using Context): Tree = {
 
     def realApply(using Context): Tree = {
-      val originalProto = new FunProto(tree.args, IgnoredProto(pt))(this, tree.isUsingApply)(argCtx(tree))
+      val originalProto = new FunProto(tree.args, IgnoredProto(pt))(this, tree.isUsingApply)(using argCtx(tree))
       record("typedApply")
       val fun1 = typedFunPart(tree.fun, originalProto)