title: App.yaml error expected <block end>, but found '-'
body: <p>I have the follow app.yaml:</p>
  
  <pre><code>application: myapp
  version: 3
  runtime: php55
  api_version: 1
  threadsafe: yes
  
  handlers:
  - url: /favicon\.ico
    static_files: favicon.ico
    upload: favicon\.ico
  
  - url: /
    script: main.php
  
  - url: /src
    static_dir: src
  
    - url: /vendor
    static_dir: vendor
  </code></pre>
  
  <p>But, when i deploy it, the console shows the error:</p>
  
  <pre><code>appcfg.py: error: Error parsing C:\app.yaml: w
  hile parsing a block mapping
    in "C:\app.yaml", line 15, column 3
  expected &lt;block end&gt;, but found '-'
    in "C:\app.yaml", line 18, column 3.
  </code></pre>
  
  <p>The code is like Google reference in <code>https://cloud.google.com/appengine/docs/standard/php/config/appref</code></p>
  
  <p>What is wrong with it? Thanks</p>