Upgraded 7+ gems by rebuilding Gemfile.lock file; Removed blanks at end of lines in layouts file

Gemfile.lock

@@ -101,7 +101,7 @@ GEM
       trollop (~> 2.0)
     gherkin (2.12.2)
       multi_json (~> 1.3)
-    guard (2.12.5)
+    guard (2.12.6)
       formatador (>= 0.2.4)
       listen (~> 2.7)
       lumberjack (~> 1.0)
@@ -161,7 +161,7 @@ GEM
     mime-types (2.6.1)
     mini_portile (0.5.3)
     minitest (4.7.5)
-    multi_json (1.11.0)
+    multi_json (1.11.1)
     multi_test (0.1.2)
     mysql2 (0.3.18)
     nenv (0.2.0)

app/views/layouts/shared/_header.html.erb

@@ -31,7 +31,12 @@
       </ul>
       <ul class="mini-nav">
         <li>
-          <%= button_to "Visit Tutorial", "https://github.com/OWASP/railsgoat/wiki/tutorials", {:class => "btn", :method => "get"} %>
+          <%= button_to "Visit Tutorial", nil,
+          {
+           :class => "btn",
+           :method => "get",
+           :onclick => "window.open('https://github.com/OWASP/railsgoat/wiki/tutorials', '_blank')"
+           }  %>
         </li>
       </ul>
   </header>
@@ -55,11 +60,16 @@
       </ul>
       <ul class="mini-nav">
         <li>
-          <%= button_to "Visit Tutorial", "https://github.com/OWASP/railsgoat/wiki/tutorials", {:class => "btn", :method => "get"} %>
+            <%= button_to "Visit Tutorial", nil,
+            {
+             :class => "btn",
+             :method => "get",
+             :onclick => "window.open('https://github.com/OWASP/railsgoat/wiki/tutorials', '_blank')"
+             }  %>
         </li>
       </ul>
   </header>
-  
+
   <div id="modal_div" class="modal hide fade" tabindex="-1" role="dialog" aria-labelledby="myAlert" aria-hidden="true">
   </div>