Fix TOC htmlentities rendering (#105)

Author: emad-elsaid

extensions/toc/templates/toc.html

@@ -1,6 +1,6 @@
 {{ define "toc-item" }}
 <li>
-  <a href="#{{ printf "%s" .ID}}">{{ printf "%s" .Title}}</a>
+  <a href="#{{ printf "%s" .ID}}">{{ printf "%s" .Title | raw }}</a>
   {{ with .Items }}
   <ul class="menu-list">
     {{ range . }}

helpers.go

@@ -28,6 +28,7 @@ var helpers = template.FuncMap{
 	"emoji":          Emoji,
 	"base":           path.Base,
 	"dir":            dir,
+	"raw":            raw,
 }
 
 var ErrHelperRegistered = errors.New("Helper already registered")
@@ -194,3 +195,8 @@ func dir(s string) string {
 
 	return v
 }
+
+// raw a helper to output input string as safe HTML
+func raw(i string) template.HTML {
+	return template.HTML(i)
+}