esm: change transformSource to load for error

Author: bmacnaughton

lib/internal/modules/esm/translators.js

@@ -116,7 +116,7 @@ function assertBufferSource(body, allowString, hookName) {
  */
 function stringify(body) {
   if (typeof body === 'string') { return body; }
-  assertBufferSource(body, false, 'transformSource');
+  assertBufferSource(body, false, 'load');
   const { TextDecoder } = require('internal/encoding');
   DECODER = DECODER === null ? new TextDecoder() : DECODER;
   return DECODER.decode(body);