Trim trailing whitespace

Author: drbrain

lib/net/http/persistent.rb

@@ -202,7 +202,7 @@ class Net::HTTP::Persistent
   ##
   # The default connection pool size is 1/4 the allowed open files.
 
-  if Gem.win_platform? then 
+  if Gem.win_platform? then
     DEFAULT_POOL_SIZE = 256
   else
     DEFAULT_POOL_SIZE = Process.getrlimit(Process::RLIMIT_NOFILE).first / 4