Fix backport_node script.

- Change indentation from 4 to 2 in accordance with Node.js guidelines.
- Fix --no-review option.

R=petermarshall@chromium.org

Change-Id: Ia525297292b0f13776e2264d5cf82dcc7ec449ad
Reviewed-on: https://chromium-review.googlesource.com/574860Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Commit-Queue: Yang Guo <yangguo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46778}

tools/release/backport_node.py

@@ -75,12 +75,12 @@ def CreateCommit(options):
   body = subprocess.check_output(
       ["git", "log", options.commit, "-1", "--format=%B"],
       cwd=options.v8_path).strip()
-  body = '\n'.join("    " + line for line in body.splitlines())
+  body = '\n'.join("  " + line for line in body.splitlines())
 
   message = title + "\n\nOriginal commit message:\n\n" + body
 
   # Create commit at target.
-  review_message = "" if options.no_review else "-e"
+  review_message = "--no-edit" if options.no_review else "--edit"
   git_commands = [
     ["git", "checkout", "-b", "backport_%s" % shorthash],  # new branch
     ["git", "add", TARGET_SUBDIR],                         # add files

tools/release/test_backport_node.py

@@ -54,7 +54,7 @@ class TestUpdateNode(unittest.TestCase):
 
     # Check message.
     message = subprocess.check_output(['git', 'log', '-1', '--format=%B'], cwd=node_cwd)
-    self.assertIn('Original commit message:\n\n    Title\n\n    Body', message)
+    self.assertIn('Original commit message:\n\n  Title\n\n  Body', message)
 
     # Check patch.
     gitlog = subprocess.check_output(