Remove the warning about auto-regeneration on Windows (#8821)
Remove the warning about auto-regeneration on Windows (#8821)

Merge pull request 8821
chrisfinazzo/jekyll,jekyll/jekyll,ryanshaw/jekyll,ryanshaw/jekyll,jekyll/jekyll,ryanshaw/jekyll,fulldecent/jekyll,chrisfinazzo/jekyll,fulldecent/jekyll,chrisfinazzo/jekyll,jekyll/jekyll,jekyll/jekyll,fulldecent/jekyll,fulldecent/jekyll,chrisfinazzo/jekyll,ryanshaw/jekyll