don't output newlines in the end if there are no reference-style links

lib/remark.rb

@@ -11,7 +11,7 @@ def initialize(source, options = {})
   def to_markdown
     parent = scope
     collect_ignored_elements(parent)
-    remark_block(parent) + (inline_links?? '' : "\n\n\n" + output_reference_links)
+    remark_block(parent) + (inline_links? || @links.empty?? '' : "\n\n\n" + output_reference_links)
   end
 
   def scope

spec/remark_spec.rb

@@ -135,19 +135,6 @@ def remark(source, options = {})
       remark("<p>I <a href='#'>am <em>fine</em></a></p>").should == "I [am _fine_](#)"
     end
 
-    it "should support hyperlinks" do
-      remark("<p>Click <a href='http://mislav.uniqpath.com'>here</a></p>").should ==
-        "Click [here](http://mislav.uniqpath.com)"
-      remark("<a href='/foo' title='bar'>baz</a>").should == '[baz](/foo "bar")'
-    end
-
-    it "should have reference-style hyperlinks" do
-      remark("<p>Click <a href='foo' title='mooslav'>here</a> and <a href='bar'>there</a></p>", :inline_links => false).should ==
-        "Click [here][1] and [there][2]\n\n\n[1]: foo  \"mooslav\"\n[2]: bar"
-      remark("<p>Click <a href='foo'>here</a> and <a href='foo'>there</a></p>", :inline_links => false).should ==
-        "Click [here][1] and [there][1]\n\n\n[1]: foo"
-    end
-
     it "should support image tags" do
       remark("<img src='moo.jpg' alt='cow'>").should == '![cow](moo.jpg)'
       remark("<img src='moo.jpg' alt='cow' width='16'>").should == '<img src="moo.jpg" alt="cow" width="16" />'
@@ -166,6 +153,22 @@ def remark(source, options = {})
     end
   end
 
+  describe "hyperlinks" do
+    it "should support hyperlinks" do
+      remark("<p>Click <a href='http://mislav.uniqpath.com'>here</a></p>").should ==
+        "Click [here](http://mislav.uniqpath.com)"
+      remark("<a href='/foo' title='bar'>baz</a>").should == '[baz](/foo "bar")'
+    end
+
+    it "should have reference-style hyperlinks" do
+      remark("<p>Click <a href='foo' title='mooslav'>here</a> and <a href='bar'>there</a></p>", :inline_links => false).should ==
+        "Click [here][1] and [there][2]\n\n\n[1]: foo  \"mooslav\"\n[2]: bar"
+      remark("<p>Click <a href='foo'>here</a> and <a href='foo'>there</a></p>", :inline_links => false).should ==
+        "Click [here][1] and [there][1]\n\n\n[1]: foo"
+      remark("", :inline_links => false).should == ""
+    end
+  end
+
   it "should support blockquotes" do
     remark("<blockquote>Cogito, ergo sum</blockquote>").should == '> Cogito, ergo sum'
     remark("<blockquote><p>I think</p><p>therefore I am</p></blockquote>").should == "> I think\n> \n> therefore I am"