.gitignore in wordpress_tools-1.0.0 vs .gitignore in wordpress_tools-1.0.1

@@ -4,11 +4,7 @@
 /_yardoc/
 /coverage/
 /doc/
 /pkg/
 /spec/reports/
-/tmp/
-*.bundle
-*.so
-*.o
-*.a
-mkmf.log
+/tmp/*
+!.keep