diff --git a/lib/paperclip/interpolations.rb b/lib/paperclip/interpolations.rb
index 60e08f3d2..2dd346f88 100644
--- a/lib/paperclip/interpolations.rb
+++ b/lib/paperclip/interpolations.rb
@@ -32,13 +32,13 @@ def self.interpolate pattern, *args
       pattern = args.first.instance.send(pattern) if pattern.kind_of? Symbol
       result = pattern.dup
       interpolators_cache.each do |tag|
-        result.gsub!(tag_pattern_cache[tag]) {send( tag, *args )}
+        result.gsub!(tag_pattern_cache[tag]) { send(tag, *args) }
       end
       result
     end
 
     def self.tag_pattern_cache
-      @tag_pattern_cache ||= Hash.new {|hash, key| hash[key]= ":#{key}"}
+      @tag_pattern_cache ||= Hash.new { |hash, key| hash[key] = ":#{key}" }
     end
 
     def self.interpolators_cache