public void Conclude ()
{
    const string input = @"<code language=""ruby"">return &#39;3 < 5&#39;</code>";
    var cbm = new CodeBlockModifier ();
    var actual = cbm.Conclude (input);
    Assert.AreEqual (@"<code language=""ruby"">return '3 < 5'</code>", actual);
}
public void ModifyLine ()
{
    var cbm = new CodeBlockModifier();
    var actual = cbm.ModifyLine ("(@|ruby|r.to_html@)");
    Assert.AreEqual (@"(<code language=""ruby"">r.to_html</code>)", actual);
}