Operation description change is detected as a change but it is not rendered by HtmlRender

When the operation's description changes it is not rendered in the Html

In the following specifications the only difference when compared in text edit are their version and the operation's description

sample-api_3.47.0_ALL.json
sample-api_3.48.0_ALL.json

The operation is detected as changed but renders nothing

testDiff.html

Report was generated by using the example code in home page by specifying rendering all changes i.e.
HtmlRender htmlRender = new HtmlRender("Changelog", "http://deepoove.com/swagger-diff/stylesheets/demo.css", true);

从 HtmlRender 示例配置开始，并比较 sample-api_3.47.0_ALL.json 和 sample-api_3.48.0_ALL.json 在 testDiff.html 中的输出。跟踪已更改的操作描述是如何被处理和渲染的；完成的标准是，在渲染所有更改时，生成的 HTML 中能明显包含描述更改。