title: Regex for numbers on scientific notation?
body: <p>I'm loading a .obj file that has lines like</p>
  
  <blockquote>
    <p>vn 8.67548e-017 1 -1.55211e-016</p>
  </blockquote>
  
  <p>for the vertex normals. How can I detect them and bring them to double notation? </p>