Make code a bit more readable

lib/vagrant/hosts/bsd.rb

@@ -25,7 +25,8 @@ module Vagrant
         output.split("\n").each do |line|
           # This should only ask for administrative permission once, even
           # though its executed in multiple subshells.
-          system(%Q[sudo su root -c "echo '#{line.gsub('"', '\"')}' >> /etc/exports"])
+          line = line.gsub('"', '\"')
+          system(%Q[sudo su root -c "echo '#{line}' >> /etc/exports"])
         end
 
         # We run restart here instead of "update" just in case nfsd