fix previews

lib/gollum/frontend/app.rb

@@ -81,11 +81,9 @@ module Precious
     end
 
     post '/preview' do
-      @name = params['page']
-      format = params['format']
-      data = params['content']
-      wiki = Gollum::Wiki.new(settings.gollum_path)
-      @page = wiki.preview_page("Preview", data, format)
+      wiki     = Gollum::Wiki.new(settings.gollum_path)
+      @name    = "Preview"
+      @page    = wiki.preview_page(@name, params[:content], params[:format])
       @content = @page.formatted_data
       mustache :page
     end

test/test_app.rb

@@ -39,6 +39,10 @@ context "Frontend" do
     assert_equal 'def', page.version.message
   end
 
+  test "previews content" do
+    post "/preview", :content => 'abc', :format => 'markdown'
+  end
+
   def app
     Precious::App
   end