Fix the email variable substituation in ssh help page

app/views/help/show.html.haml

 .documentation.wiki
-  = markdown File.read(Rails.root.join('doc', @category, @file + '.md'))
+  = markdown File.read(Rails.root.join('doc', @category, @file + '.md')).gsub("$your_email", current_user.email)

spec/features/help_pages_spec.rb

+require 'spec_helper'
+
+describe "Help Pages", feature: true do
+  describe "Show SSH page" do
+    before do
+      login_as :user
+    end
+    it "replace the variable $your_email with the email of the user" do
+      visit help_page_path(category: "ssh", file: "ssh.md")
+      page.should have_content("ssh-keygen -t rsa -C \"#{@user.email}\"")
+    end
+  end
+end