Fix stray characters in index.html

Author: marijnh

html/index.html

@@ -26,7 +26,6 @@ <h1>Eloquent JavaScript<div style="font-size: 70%">3rd edition</div></h2>
   the digital. You can read it online here, or get your own
   <a href="http://www.amazon.com/gp/product/1593275846/ref=as_li_qf_sp_asin_il_tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=1593275846&linkCode=as2&tag=marijhaver-20&linkId=VPXXXSRYC5COG5R5">paperback
   copy</a> of the <em>second</em> edition. A paper third edition is expected to be <a href="https://www.amazon.com/Eloquent-JavaScript-3rd-Introduction-Programming/dp/1593279507/ref=as_sl_pc_tf_til?tag=marijhaver-20&linkCode=w00&linkId=a66fb027ed271b1cbd37e076b83c19b4&creativeASIN=1593279507">available</a> this October.</p>
-  .</p>
 
   <p style="text-align: center; margin: 2em 0">
     <img src="img/cover.jpg" alt="Cover image" style="border: 1px solid black; max-width: 100%; box-shadow: 4px 4px 7px rgba(0, 0, 0, 0.4)">