title: How to highlight correct word on searchDelegate?
body: <p>I highlighted the word, but not the correct word. </p>
  
  <p>In my BuilderSuggection, I added like this code,</p>
  
  <p><a href="https://i.stack.imgur.com/zD0rt.jpg" rel="noreferrer"><img src="https://i.stack.imgur.com/zD0rt.jpg" alt="check my searchDelegate"></a></p>
  
  <pre><code> title: RichText(
            text: TextSpan(
                text: suggestList[index].d.substring(0, query.length),
                style: TextStyle(
                    color: Colors.black, fontWeight: FontWeight.bold),
                children: [
              TextSpan(
                  text: suggestList[index].d.substring(query.length),
                  style: TextStyle(color: Colors.grey))
            ])),
  </code></pre>