[generation] Strip whitespace from generated YAML

tools/generation/lib/template.py

@@ -119,7 +119,7 @@ class Template:
         features += case_values['meta'].get('features', [])
         features += self.attribs['meta'].get('features', [])
         if len(features):
-            lines += ['features: ' + yaml.dump(features)]
+            lines += ['features: ' + yaml.dump(features).strip()]
 
         flags = ['generated']
         flags += case_values['meta'].get('flags', [])

tools/generation/test/expected/normal/features-normal.js

@@ -0,0 +1,14 @@
+// This file was procedurally generated from the following sources:
+// - tools/generation/test/fixtures/normal.case
+// - tools/generation/test/fixtures/normal/features.template
+/*---
+description: foobar (First template name)
+es6id: 1.2.3
+features: [f1]
+flags: [generated, a, b]
+includes: [foo.js]
+info: >
+    case info
+---*/
+
+'This is "teardown" code.';

tools/generation/test/fixtures/normal/features.template

@@ -0,0 +1,8 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+name: First template name
+path: normal/features-
+es6id: 1.2.3
+features: [f1]
+---*/