Add new comment


On line (?) 26, i think it should be


instead of


Not sure if i'm right or just missing something...
anyway very interesting and useful article thank you

Filtered HTML

  • Web page addresses and email addresses turn into links automatically.
  • Allowed HTML tags: <a href hreflang> <em> <strong> <cite> <code> <ul type> <ol start type> <li> <dl> <dt> <dd>
  • Lines and paragraphs break automatically.