whitespace.rake.patch

diff --git a/lib/tasks/whitespace.rake b/lib/tasks/whitespace.rake
index c5b9d4c..b8a6ee3 100644
--- a/lib/tasks/whitespace.rake
+++ b/lib/tasks/whitespace.rake
@@ -1,15 +1,15 @@
 namespace :whitespace do
   desc 'Removes trailing whitespace'
   task :cleanup do
-    sh %{find . -name '*.rb' -exec sed -i '' 's/ *$//g' {} \\;}
+    sh %{find . -name '*.rb' -exec sed -i 's/ *$//g' {} \\;}
   end
   desc 'Converts hard-tabs into two-space soft-tabs'
   task :retab do
-    sh %{find . -name '*.rb' -exec sed -i '' 's/\t/  /g' {} \\;}
+    sh %{find . -name '*.rb' -exec sed -i  's/\t/  /g' {} \\;}
   end
   desc 'Remove consecutive blank lines'
   task :scrub_gratuitous_newlines do
-    sh %{find . -name '*.rb' -exec sed -i '' '/./,/^$/!d' {} \\;}
+    sh %{find . -name '*.rb' -exec sed -i  '/./,/^$/!d' {} \\;}
   end
 end