Update specs

spec/lib/gitlab/diff/inline_diff_marker_spec.rb

 require 'spec_helper'
 describe Gitlab::Diff::InlineDiffMarker, lib: true do
-  describe '#inline_diffs' do
+  describe '#mark' do
     context "when the rich text is html safe" do
-      let(:raw)  { "abc 'def'" }
-      let(:rich) { %{<span class="abc">abc</span><span class="space"> </span><span class="def">&#39;def&#39;</span>}.html_safe }
+      let(:raw)  { "abc <def>" }
+      let(:rich) { %{<span class="abc">abc</span><span class="space"> </span><span class="def">&lt;def&gt;</span>}.html_safe }
       let(:inline_diffs) { [2..5] }
-      let(:subject) { Gitlab::Diff::InlineDiffMarker.new(raw, rich).mark(inline_diffs) }
+      let(:subject) { described_class.new(raw, rich).mark(inline_diffs) }
       it 'marks the inline diffs' do
-        expect(subject).to eq(%{<span class="abc">ab<span class='idiff left'>c</span></span><span class="space"><span class='idiff'> </span></span><span class="def"><span class='idiff right'>&#39;d</span>ef&#39;</span>})
+        expect(subject).to eq(%{<span class="abc">ab<span class='idiff left'>c</span></span><span class="space"><span class='idiff'> </span></span><span class="def"><span class='idiff right'>&lt;d</span>ef&gt;</span>})
         expect(subject).to be_html_safe
       end
     end
-    context "when the text text is not html safe" do
-      let(:raw)  { "abc 'def'" }
+    context "when the text is not html safe" do
+      let(:raw)  { "abc <def>" }
       let(:inline_diffs) { [2..5] }
-      let(:subject) { Gitlab::Diff::InlineDiffMarker.new(raw).mark(inline_diffs) }
+      let(:subject) { described_class.new(raw).mark(inline_diffs) }
       it 'marks the inline diffs' do
-        expect(subject).to eq(%{ab<span class='idiff left right'>c &#39;d</span>ef&#39;})
+        expect(subject).to eq(%{ab<span class='idiff left right'>c &lt;d</span>ef&gt;})
         expect(subject).to be_html_safe
       end
     end