Fix 3352 (#3397)

* Update CHANGELOG.md

* fix #3352

qiita_pet/templates/study_ajax/prep_summary.html

@@ -434,7 +434,7 @@ <h4>
 
       <span id="prep-name-span">{{name}}</span> - ID {{prep_id}} ({{data_type}})
       {% if user_level in ('admin', 'wet-lab admin') and creation_job is not None %}
-          <a class="btn btn-default" download="{{creation_job_filename}}" href="data:text/plain;charset=utf-8,{{creation_job_filename_body}}"><span class="glyphicon glyphicon-download-alt"></span> SampleSheet</a>
+          <a class="btn btn-default" download="{{creation_job_filename}}" href="data:text/plain;charset=utf-8,encodeURIComponent({{creation_job_filename_body}})"><span class="glyphicon glyphicon-download-alt"></span> SampleSheet</a>
           {% if creation_job_artifact_summary is not None %}
             <a class="btn btn-default" target="_blank" href="{% raw qiita_config.portal_dir %}/artifact/html_summary/{{creation_job_artifact_summary}}"><span class="glyphicon glyphicon-download-alt"></span> Creation Job Output</a>
           {% end %}