Using https protocol instead of http.

lib/jekyll/tags/gist.rb

@@ -11,7 +11,7 @@ module Jekyll
     end
 
     def render(context)
-      "<script src=\"http://gist.github.com/#{@gist}.js\"> </script>"
+      "<script src=\"https://gist.github.com/#{@gist}.js\"> </script>"
     end
   end
 end

test/test_tags.rb

@@ -218,7 +218,7 @@ CONTENT
     end
     
     should "write script tag" do
-      assert_match %r{<script src='http://gist.github.com/#{@gist}.js'>\s</script>}, @result
+      assert_match %r{<script src='https://gist.github.com/#{@gist}.js'>\s</script>}, @result
     end
   end
 end