diff --git a/Rakefile b/Rakefile
index 78ada82..52f4771 100644
--- a/Rakefile
+++ b/Rakefile
@@ -123,9 +123,9 @@ end
 desc "generate BOM file from schematic"
 rule ".bom.csv" => ".sch" do |t|
   attributes = ["device", "value", "description", "footprint", "manufacturer", "mpn", "datasheet", "lcsc", "digikey"]
-  bom_data = bom2(t.prerequisites[0],attributes)
+  bom_data = bom2(t.prerequisites[0], attributes)
   CSV.open(t.name, "wb") do |csv|
-    all_attributes = ["refdes","qty"]+attributes
+    all_attributes = ["refdes","qty"] + attributes
     csv << all_attributes
     bom_data.each do |line|
       csv << all_attributes.collect{|attribute| line[attribute]}