[ResultBuilders] NFC: Adjust error diagnostic about use of explicit 'return' statement(s)

Author: xedin

include/swift/AST/DiagnosticsSema.def

@@ -5461,8 +5461,8 @@ NOTE(previous_result_builder_here, none,
 ERROR(result_builder_arguments, none,
       "result builder attributes cannot have arguments", ())
 ERROR(result_builder_disabled_by_return, none,
-      "application of result builder %0 disabled by explicit 'return' "
-      "statement", (Type))
+      "cannot use explicit 'return' statement in the body of result builder %0",
+      (Type))
 WARNING(result_builder_disabled_by_return_warn, none,
         "application of result builder %0 disabled by explicit 'return' "
         "statement", (Type))

test/Constraints/result_builder_diags.swift

@@ -290,7 +290,7 @@ func test_invalid_return_type_in_body() {
   tuplify(true) { _ -> (Void, Int) in
     tuplify(false) { condition in
       if condition {
-        return 42 // expected-error {{application of result builder 'TupleBuilder' disabled by explicit 'return' statement}}
+        return 42 // expected-error {{cannot use explicit 'return' statement in the body of result builder 'TupleBuilder'}}
         // expected-note@-1 {{remove 'return' statements to apply the result builder}} {{9-16=}}
       } else {
         1