fixes #997 - value in JSON example were not suffixed with comma if it it is not the last field

Author: mrin9

src/components/api-request.js

@@ -216,7 +216,6 @@ export default class ApiRequest extends LitElement {
         ${this.requestBodyTemplate()}
         ${guard([this.method, this.path, this.allowTry, this.parameters, this.activeParameterSchemaTabs], () => this.inputParametersTemplate('header'))}
         ${guard([this.method, this.path, this.allowTry, this.parameters, this.activeParameterSchemaTabs], () => this.inputParametersTemplate('cookie'))}
-        //TODO: if this.allowTry === 'false' then it may be a good idea to show a complete curl syntax generated using schema and examples
         ${this.allowTry === 'false' ? '' : html`${this.apiCallTemplate()}`}
       </div>  
     </div>

src/components/json-tree.js

@@ -102,7 +102,7 @@ export default class JsonTree extends LitElement {
 
   generateTree(data, isLast = false) {
     if (data === null) {
-      return html`<div class="null" style="display:inline;">null</div>`;
+      return html`<span class="null">null</span>${isLast ? '' : ','}`;
     }
     if (typeof data === 'object' && (data instanceof Date === false)) {
       const detailType = Array.isArray(data) ? 'array' : 'pure_object';