minor code cleanup

layouts/partials/_tile.erb

@@ -1,5 +1,5 @@
-<a href="<%= relative_path_to(@article) %>" class="tile is-child box <%= @htmlclass %>"
-  style="background-image:url('<%=@article[:banner]%>');">
+<a href="<%= @article.path %>" class="tile is-child box <%= @htmlclass %>"
+  style="background-image:url('<%= @article[:banner] %>');">
   <div class="content" >
     <div class="columns">
       <div class="column">
@@ -14,7 +14,7 @@
       </div>
     </div>
     <div class="description">
-    <%= @article[:description] %>
+      <%= @article[:description] %>
     </div>
     <div class="teaser">
       <%=  get_teaser(@article) %>

lib/helpers/tile_helper.rb

@@ -1,14 +1,7 @@
-
 module TileHelper
   def get_teaser(post)
-    content = strip_html(post.compiled_content)
-    return truncate(content, 300)
+    # excerptize is part of the TextHelper, given by nanoc
+    # https://nanoc.ws/doc/reference/helpers/#text
+    excerptize(post.reps[:text].compiled_content, length: 300)
   end
-
-  def truncate(s, max=70, elided = ' ...')
-    s.match( /(.{1,#{max}})(?:\s|\z)/ )[1].tap do |res|
-      res << elided unless res.length == s.length
-    end
-  end
-
 end