Render markdown tables in legislation draft

* Add Tables option to Redcarpet in Legislation draft

* Allow table tags in Admin Legislation Sanitizer

* Add Test to render markdown tables in Legislation drafts

* Add Test for Admin Legislation Sanitizer

We include test for image, table and h1 to h6 tags and additional tests to strengthen the allowed and disallowed parameters

* Add Table from markdown test in System and Factories

* Add test to render  tables for admin user

* Remove comment line about Redcarpet options

* Edit custom css for legislation draft table to make it responsive

spec/lib/admin_legislation_sanitizer_spec.rb

@@ -0,0 +1,65 @@
+require "rails_helper"
+
+describe AdminLegislationSanitizer do
+  let(:sanitizer) { AdminLegislationSanitizer.new }
+
+  describe "#sanitize" do
+    it "allows images" do
+      html = 'Dangerous<img src="/smile.png" alt="Smile"> image'
+      expect(sanitizer.sanitize(html)).to eq(html)
+    end
+
+    it "allows h1 to h6" do
+      html = '<h1>Heading 1</h1>
+              <h2>Heading 2</h2>
+              <h3>Heading 3</h3>
+              <h4>Heading 4</h4>
+              <h5>Heading 5</h5>
+              <h6>Heading 6</h6>'
+      expect(sanitizer.sanitize(html)).to eq(html)
+    end
+
+    it "allows tables" do
+      html = '<table>
+                <thead>
+                  <tr>
+                    <th>id</th>
+                    <th>name</th>
+                    <th>age</th>
+                    <th>gender</th>
+                  </tr>
+                </thead>
+                <tbody>
+                  <tr>
+                    <td>1</td>
+                    <td>Roberta</td>
+                    <td>39</td>
+                    <td>M</td>
+                  </tr>
+                  <tr>
+                    <td>2</td>
+                    <td>Oliver</td>
+                    <td>25</td>
+                    <td>F</td>
+                  </tr>
+                </tbody>
+              </table>'
+      expect(sanitizer.sanitize(html)).to eq(html)
+    end
+
+    it "allows alt src and id" do
+      html = 'Dangerous<img src="/smile.png" alt="Smile" id="smile"> image'
+      expect(sanitizer.sanitize(html)).to eq(html)
+    end
+
+    it "doesn't allow style" do
+      html = 'Dangerous<img src="/smile.png" alt="Smile" style="width:10px;"> image'
+      expect(sanitizer.sanitize(html)).not_to eq(html)
+    end
+
+    it "doesn't allow class" do
+      html = 'Dangerous<img src="/smile.png" alt="Smile" class="smile"> image'
+      expect(sanitizer.sanitize(html)).not_to eq(html)
+    end
+  end
+end