Update documentation
diff --git a/www/fx.html b/www/fx.html
index 3fd2a61..9005339 100644
--- a/www/fx.html
+++ b/www/fx.html
@@ -21,11 +21,11 @@
   <meta name="author" content="ImageMagick Studio LLC"/>
   <meta name="revisit-after" content="2 DAYS"/>
   <meta name="resource-type" content="document"/>
-  <meta name="copyright" content="Copyright (c) 1999-2016 ImageMagick Studio LLC"/>
+  <meta name="copyright" content="Copyright (c) 1999-2017 ImageMagick Studio LLC"/>
   <meta name="distribution" content="Global"/>
   <meta name="magick-serial" content="P131-S030410-R485315270133-P82224-A6668-G1245-1"/>
   <meta name="google-site-verification" content="_bMOCDpkx9ZAzBwb2kF3PRHbfUUdFj2uO8Jd1AXArz4" />
-  <link rel="canonical" href="https://www.imagemagick.org/script/../www/fx.html"/>
+  <link rel="canonical" href="https://www.imagemagick.org/script/fx.html"/>
   <link rel="icon" href="../images/wand.png"/>
   <link rel="shortcut icon" href="../images/wand.ico"/>
   <link rel="stylesheet" type="text/css" href="http://fonts.googleapis.com/css?family=Roboto:900,400,400italic,700,700italic,300,300italic|Open+Sans:300italic,400italic,700italic,300,400,600,700" />
@@ -239,7 +239,7 @@
 <dt> <var>x</var> <code>=</code> <var>y</var></dt><dd>assignment; assignment variables are restricted to letter combinations only (e.g. Xi not X1)</dd>
 <dt> <var>x</var> <code>;</code> <var>y</var></dt><dd>statement separator </dd>
 <dt> <code>phi</code></dt><dd> constant (1.618034...)</dd>
-<dt> <code>pi</code></dt><dd> constant (3.141659...)</dd>
+<dt> <code>pi</code></dt><dd> constant (3.14159265359...)</dd>
 <dt> <code>e</code></dt><dd> constant (2.71828...)</dd>
 <dt> <code>QuantumRange</code></dt><dd> constant maximum pixel value (255 for Q8, 65535 for Q16)</dd>
 <dt> <code>QuantumScale</code></dt><dd> constant 1.0/<code>QuantumRange</code></dd>
@@ -411,7 +411,7 @@
     <p><a href="fx.html#">Back to top</a> •
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-        <p><small>©  1999-2016 ImageMagick Studio LLC</small></p>
+        <p><small>© 1999-2017 ImageMagick Studio LLC</small></p>
   </footer>
 </div><!-- /.container -->
 
@@ -420,4 +420,4 @@
 </div>
 </body>
 </html>
-<!-- Magick Cache 30th November 2016 14:43 -->
\ No newline at end of file
+<!-- Magick Cache 24th December 2016 11:03 -->
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