title: logstash-logback-encoder display stacktrace in multiple lines
body: <p>The logstash-logback-encoder displays the output of stacktrace in one string such as</p>
  
  <pre><code>"stack_trace": "java.lang.RuntimeException: null\n\tat com.ideasforsharing.demo.controllers.SleuthController.helloSleuth(SleuthController.java:24)\n\tat sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)\n\tat sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)\n"
  </code></pre>
  
  <p>This is hard to read. How can i format the display of the stacktrace to display it over multiple lines, perhaps using json array?</p>
  
  <pre><code>"stack_trace" : [
      "java.lang.RuntimeException: null",
        "com.ideasforsharing.demo.controllers.SleuthController.helloSleuth(SleuthController.java:24)",
          "at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)",
          "at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)"
  ]
  </code></pre>