fix

examcloud-core-questions-base/src/main/java/cn/com/qmth/examcloud/core/questions/base/json/JsonExportUtil.java

@@ -75,6 +75,7 @@ public class JsonExportUtil {
         if (StringUtils.isBlank(html)) {
             return null;
         }
+        html=html.trim();
         if (!html.startsWith("<p>")) {
             html = "<p>" + html + "</p>";
         }