Added a wrap method

app/helpers/microposts_helper.rb

@@ -0,0 +1,15 @@
+module MicropostsHelper
+
+  def wrap(content)
+    sanitize(raw(content.split.map{ |s| wrap_long_string(s) }.join(' ')))
+  end
+
+  private
+
+    def wrap_long_string(text, max_width = 30)
+      zero_width_space = "​"
+      regex = /.{1,#{max_width}}/
+      (text.length < max_width) ? text : 
+                                  text.scan(regex).join(zero_width_space)
+    end
+end

app/views/shared/_feed_item.html.erb

@@ -6,7 +6,7 @@
     <span class="user">
       <%= link_to feed_item.user.name, feed_item.user %>
     </span>
-    <span class="content"><%= feed_item.content %></span>
+    <span class="content"><%= wrap(feed_item.content) %></span>
     <span class="timestamp">
       Posted <%= time_ago_in_words(feed_item.created_at) %> ago.
     </span>