Fix: error thrown when navigating to a PR page
Fix: error thrown when navigating to a PR page

The error thrown is: Uncaught TypeError: Cannot read property 'parentNode' of null

sindresorhus/hide-files-on-github,sindresorhus/github-hide-files,sindresorhus/hide-files-on-github,sindresorhus/github-hide-files,crissdev/github-hide-files,sindresorhus/hide-files-on-github