lib,tools: remove empty lines between JSDoc tags

This is in preparation for enabling a recommended JSDoc lint rule.

PR-URL: #41147
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>

Author: Trott

lib/internal/blob.js

@@ -123,7 +123,9 @@ function getSource(source, endings) {
 class Blob {
   /**
    * @typedef {string|ArrayBuffer|ArrayBufferView|Blob} SourcePart
-   *
+   */
+
+  /**
    * @param {SourcePart[]} [sources]
    * @param {{
    *   endings? : string,