Avoid generating a double newline in code_generator_frontend.py

Bug: chromium:1106746
Change-Id: If9a4074466c1df88c2810ac188dac00390e5fcea
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/3074605
Reviewed-by: Tim van der Lippe <[email protected]>
Commit-Queue: Sigurd Schneider <[email protected]>
diff --git a/scripts/build/code_generator_frontend.py b/scripts/build/code_generator_frontend.py
index 372095f..3925fd5 100644
--- a/scripts/build/code_generator_frontend.py
+++ b/scripts/build/code_generator_frontend.py
@@ -163,8 +163,7 @@
         """// Copyright (c) 2020 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
-""" + "// File is generated by %s\n\n" % get_this_script_path_(sys.argv[0]) +
-        """
+""" + "// File is generated by %s\n" % get_this_script_path_(sys.argv[0]) + """
 /**
  * @typedef {{
  *  registerCommand: function(string&any, !Array.<!{name: string, type: string, optional: boolean}>, !Array.<string>):void,