Refactor StoryRepository#normalize_url for improved readability

Author: pascalw

app/repositories/story_repository.rb

@@ -115,7 +115,10 @@ def self.normalize_url(url, base_url)
     uri      = URI.parse(url)
     base_uri = URI.parse(base_url)
 
-    uri.scheme ||= base_uri.scheme || 'http'
+    unless uri.scheme
+      uri.scheme = base_uri.scheme || 'http'
+    end
+
     uri.to_s
   end