title: jq special characters in nested keys
body: <p>I have a json similar to the following:</p>
  
  <pre><code>{
      "_source" : {
          "index-pattern" : {
              "fields" : ""
          }
      }
  }
  </code></pre>
  
  <p>I'm trying to modify fields, but chaining the . identity operator, such as <code>'jq ._source.["index-pattern"].fields</code>' produces the following error:</p>
  
  <pre><code>'._source.["index-pattern"]
           ^
  1 compile error'
  </code></pre>
  
  <p>Any ideas?</p>
  
  <p>thanks</p>