FIX: handle <pre> inside <blockquote> in html_to_markdown

lib/html_to_markdown.rb

@@ -75,11 +75,12 @@ class HtmlToMarkdown
     code = node.children.find { |c| c.name == "code" }
     code_class = code ? code["class"] : ""
     lang = code_class ? code_class[/lang-(\w+)/, 1] : ""
-    @stack << Block.new("pre")
-    @markdown << "```#{lang}\n"
+    pre = Block.new("pre")
+    pre.markdown = "```#{lang}\n"
+    @stack << pre
     traverse(node)
+    pre.markdown << "\n```\n"
     @markdown << format_block
-    @markdown << "```\n"
   end
 
   def visit_blockquote(node)

spec/components/html_to_markdown_spec.rb

@@ -191,6 +191,10 @@ describe HtmlToMarkdown do
     expect(html_to_markdown(%Q{<pre><code class="lang-javascript">var foo = 'bar';</code></pre>})).to eq("```javascript\nvar foo = 'bar';\n```")
   end
 
+  it "supports <pre> inside <blockquote>" do
+    expect(html_to_markdown("<blockquote><pre><code>var foo = 'bar';</code></pre></blockquote>")).to eq("> ```\n> var foo = 'bar';\n> ```")
+  end
+
   it "works" do
     expect(html_to_markdown("<ul><li><p>A list item with a blockquote:</p><blockquote><p>This is a <strong>blockquote</strong><br>inside a list item.</p></blockquote></li></ul>")).to eq("- A list item with a blockquote:\n\n  > This is a **blockquote**\n  > inside a list item.")
   end