You are looking at the HTML representation of the XML format.
HTML is good for debugging, but is unsuitable for application use.
Specify the format parameter to change the output format.
To see the non HTML representation of the XML format, set format=xml.
See the complete documentation, or API help for more information. 
<?xml version="1.0"?>
<api>
  <query-continue>
    <allimages aicontinue="20170613170850|LearningAtlasForC_9.png" />
  </query-continue>
  <query>
    <allimages>
      <img name="LearningAtlasForC_19.png" timestamp="2017-06-13T17:16:54Z" user="Jon.Mathews" url="https://ensoftatlas.com/images/9/90/LearningAtlasForC_19.png" descriptionurl="https://ensoftatlas.com/wiki/File:LearningAtlasForC_19.png" ns="6" title="File:LearningAtlasForC 19.png" />
      <img name="LearningAtlasForC_18.png" timestamp="2017-06-13T17:16:30Z" user="Jon.Mathews" url="https://ensoftatlas.com/images/9/9e/LearningAtlasForC_18.png" descriptionurl="https://ensoftatlas.com/wiki/File:LearningAtlasForC_18.png" ns="6" title="File:LearningAtlasForC 18.png" />
      <img name="LearningAtlasForC_17.png" timestamp="2017-06-13T17:16:04Z" user="Jon.Mathews" url="https://ensoftatlas.com/images/a/a2/LearningAtlasForC_17.png" descriptionurl="https://ensoftatlas.com/wiki/File:LearningAtlasForC_17.png" ns="6" title="File:LearningAtlasForC 17.png" />
      <img name="LearningAtlasForC_16.png" timestamp="2017-06-13T17:15:21Z" user="Jon.Mathews" url="https://ensoftatlas.com/images/d/d6/LearningAtlasForC_16.png" descriptionurl="https://ensoftatlas.com/wiki/File:LearningAtlasForC_16.png" ns="6" title="File:LearningAtlasForC 16.png" />
      <img name="LearningAtlasForC_15.png" timestamp="2017-06-13T17:14:55Z" user="Jon.Mathews" url="https://ensoftatlas.com/images/7/78/LearningAtlasForC_15.png" descriptionurl="https://ensoftatlas.com/wiki/File:LearningAtlasForC_15.png" ns="6" title="File:LearningAtlasForC 15.png" />
      <img name="LearningAtlasForC_14.png" timestamp="2017-06-13T17:14:15Z" user="Jon.Mathews" url="https://ensoftatlas.com/images/5/5a/LearningAtlasForC_14.png" descriptionurl="https://ensoftatlas.com/wiki/File:LearningAtlasForC_14.png" ns="6" title="File:LearningAtlasForC 14.png" />
      <img name="LearningAtlasForC_13.png" timestamp="2017-06-13T17:11:55Z" user="Jon.Mathews" url="https://ensoftatlas.com/images/3/32/LearningAtlasForC_13.png" descriptionurl="https://ensoftatlas.com/wiki/File:LearningAtlasForC_13.png" ns="6" title="File:LearningAtlasForC 13.png" />
      <img name="LearningAtlasForC_12.png" timestamp="2017-06-13T17:11:09Z" user="Jon.Mathews" url="https://ensoftatlas.com/images/8/82/LearningAtlasForC_12.png" descriptionurl="https://ensoftatlas.com/wiki/File:LearningAtlasForC_12.png" ns="6" title="File:LearningAtlasForC 12.png" />
      <img name="LearningAtlasForC_11.png" timestamp="2017-06-13T17:10:17Z" user="Jon.Mathews" url="https://ensoftatlas.com/images/e/e0/LearningAtlasForC_11.png" descriptionurl="https://ensoftatlas.com/wiki/File:LearningAtlasForC_11.png" ns="6" title="File:LearningAtlasForC 11.png" />
      <img name="LearningAtlasForC_10.png" timestamp="2017-06-13T17:09:20Z" user="Jon.Mathews" url="https://ensoftatlas.com/images/0/05/LearningAtlasForC_10.png" descriptionurl="https://ensoftatlas.com/wiki/File:LearningAtlasForC_10.png" ns="6" title="File:LearningAtlasForC 10.png" />
    </allimages>
  </query>
</api>