diff --git a/lib/jekyll/static_file.rb b/lib/jekyll/static_file.rb
index 881e44b1..72c26741 100644
--- a/lib/jekyll/static_file.rb
+++ b/lib/jekyll/static_file.rb
@@ -124,7 +124,7 @@ module Jekyll
           :template => @collection.url_template,
           :placeholders => placeholders,
         })
-      end.to_s.gsub /\/$/, ''
+      end.to_s.gsub(/\/$/, '')
     end
 
     # Returns the type of the collection if present, nil otherwise.
diff --git a/lib/jekyll/url.rb b/lib/jekyll/url.rb
index 367872c0..950945a7 100644
--- a/lib/jekyll/url.rb
+++ b/lib/jekyll/url.rb
@@ -92,7 +92,7 @@ module Jekyll
     # as well as the beginning "/" so we can enforce and ensure it.
 
     def sanitize_url(str)
-      "/" + str.gsub(/\/{2,}/, "/").gsub(%r!\.+\/|\A/+!, "")
+      "/" + str.gsub(/\/{2,}/, "/").gsub(/\.+\/|\A\/+/, "")
     end
 
     # Escapes a path to be a valid URL path segment