https://github.com/swagger-api/swagger-ui/issues/1664

dist/swagger-ui.js

@@ -757,7 +757,7 @@ this["Handlebars"]["templates"]["operation"] = Handlebars.template({"1":function
   if (stack1 != null) { buffer += stack1; }
   stack1 = helpers['if'].call(depth0, (depth0 != null ? depth0.isReadOnly : depth0), {"name":"if","hash":{},"fn":this.program(22, data),"inverse":this.program(24, data),"data":data});
   if (stack1 != null) { buffer += stack1; }
-  buffer += "        </form>\n        <div class='response' style='display:none'>\n          <h4>Curl</h4>\n          <div class='block curl'></div>\n          <h4 data-sw-translate>Request URL</h4>\n          <div class='block request_url'></div>\n";
+  buffer += "        </form>\n        <div class='response' style='display:none'>\n          <h4 class='curl'>Curl</h4>\n          <div class='block curl'></div>\n          <h4 data-sw-translate>Request URL</h4>\n          <div class='block request_url'></div>\n";
   stack1 = helpers['if'].call(depth0, (depth0 != null ? depth0.showRequestHeaders : depth0), {"name":"if","hash":{},"fn":this.program(26, data),"inverse":this.noop,"data":data});
   if (stack1 != null) { buffer += stack1; }
   return buffer + "          <h4 data-sw-translate>Response Body</h4>\n          <div class='block response_body'></div>\n          <h4 data-sw-translate>Response Code</h4>\n          <div class='block response_code'></div>\n          <h4 data-sw-translate>Response Headers</h4>\n          <div class='block response_headers'></div>\n        </div>\n      </div>\n    </li>\n  </ul>\n";

src/main/template/operation.handlebars

@@ -92,7 +92,7 @@
           {{/if}}
         </form>
         <div class='response' style='display:none'>
-          <h4>Curl</h4>
+          <h4 class='curl'>Curl</h4>
           <div class='block curl'></div>
           <h4 data-sw-translate>Request URL</h4>
           <div class='block request_url'></div>