handle stripped tags between exclamation marks and links

lib/reverse_markdown/converters/a.rb

@@ -10,10 +10,16 @@ def convert(node)
           name
         else
           link = "[#{name}](#{href}#{title})"
-          link.prepend(' ') if node.previous_sibling.to_s.end_with?('!')
+          link.prepend(' ') if prepend_space?(node)
           link
         end
       end
+
+      private
+
+      def prepend_space?(node)
+        node.at_xpath("preceding::text()[1]").to_s.end_with?('!')
+      end
     end
 
     register :a, A.new

spec/assets/anchors.html

@@ -6,6 +6,7 @@
     <a href="http://strong.foobar.com"><strong>Strong foobar</strong></a>
     There should be no extra space before and after the anchor (<a href="http://foobar.com">stripped</a>).
     Exception: after an !<a href="http://not.an.image.foobar.com">there</a> should be an extra space.
+    Even with stripped elements inbetween: !<span><a href="http://still.not.an.image.foobar.com">there</a></span> should be an extra space.
 
     ignore <a href="foo.html">   </a> anchor tags with no link text
     not ignore <a href="foo.html"><img src="image.png" alt="An Image" /></a> anchor tags with images

spec/components/anchors_spec.rb

@@ -15,6 +15,7 @@
   it { is_expected.to include ' ![foobar image 2](http://foobar.com/foobar2.png "this is the foobar image 2") ' }
   it { is_expected.to include 'no extra space before and after the anchor ([stripped](http://foobar.com)).'}
   it { is_expected.to include 'after an ! [there](http://not.an.image.foobar.com) should be an extra space.'}
+  it { is_expected.to include 'with stripped elements inbetween: ! [there](http://still.not.an.image.foobar.com) should be an extra space.'}
 
   context "links to ignore" do
     it { is_expected.to include ' ignore anchor tags with no link text ' }