Minor fixes to website generation

docs/templates/shared/_head.html.j2

@@ -7,7 +7,7 @@
     <title>{{headline}}</title>
     <meta name="viewport" content="width=device-width, initial-scale=1">
     <meta http-equiv="X-UA-Compatible" content="IE=edge" />
-    <link rel="canonical" href="{{ url }}{{ permalink | replace('/index','') }}" />
+    <link rel="canonical" href="{{ url }}/{{ permalink }}" />
     <link href="https://maxcdn.bootstrapcdn.com/bootswatch/3.3.5/spacelab/bootstrap.min.css" rel="stylesheet" integrity="sha256-j7Dtnd7ZjexEiPNbscbopFn9+Cs0b3TLipKsWAPHZIM= sha512-RFhfi6P8zWMAJrEGU+CPjuxPh3r/UUBGqQ+/o6WKPIVZmQqeOipGotH2ihRULuQ8wsMBoK15TSZqc/7VYWyuIw==" crossorigin="anonymous">
     <link rel="stylesheet" href="{{ root }}/css/base.css" type="text/css">
     <!--[if lt IE 9]>