check &gt, &lt in Markdown Codeblock

checker.js

const fs = require('fs');
const path = require('path');

function search_gt_lt(tmp_path) {
  fs.readdir(tmp_path, (err, files) => {
    if (err) throw err;
    files.forEach(file => {
      const next_path = path.join(tmp_path, file);

      fs.stat(next_path, (err, stats) => {
        if (err) throw err;

        if (stats.isDirectory()) {
          search_gt_lt(next_path);
        } else {
          if (file.match(/\.md$/)) {
            const data = fs.readFileSync(next_path, 'utf8');
            const found_gt = data.match(/```[^>]*&gt[^<]*```/);
            const found_lt = data.match(/```[^>]*&lt[^<]*```/);
            if (found_gt) {
              console.log(file);
              console.log(found_gt[0]);
            }
            if (found_lt) {
              console.log(file);
              console.log(found_lt[0]);
            }
          }
        }
      })
    })
  })
}

search_gt_lt('.');