title: Get only content of file and run `tpl` on this content [kubernetes-helm]
body: <p>I am not able to figure out a way to get the content of file and run <code>tpl</code> on this content</p>
  <p>Yaml input input file :</p>
  <pre><code>spec:
  {{- (tpl ($.Files.Glob config.yaml).AsConfig $) | nindent 2 }}
  </code></pre>
  <p>Content of config.yaml</p>
  <pre><code>key1: {{ .Values.value1 }}
  key2: {{ .Values.value2 }}
  </code></pre>
  <p>Content of values.yaml file</p>
  <pre><code>value1: value1
  value2: value2
  </code></pre>
  <p>Helm template output:</p>
  <pre><code>spec:
    config.yaml: |-
      key1: value2
      key2: value2
  </code></pre>
  <p>What I want</p>
  <pre><code>spec:
    # config.yaml: |- should be removed
    key1: value2
    key2: value2
  </code></pre>