pathname: remove redundant spacing

Library/Homebrew/extend/pathname.rb

@@ -177,7 +177,6 @@ class Pathname
   end
   private :default_stat
 
-
   # @private
   def cp_path_sub(pattern, replacement)
     raise "#{self} does not exist" unless self.exist?
@@ -230,7 +229,6 @@ class Pathname
     false
   end
 
-
   # @private
   def version
     require "version"