follow Ruby Style Guide for some points

spec/spec_helper.rb

@@ -16,13 +16,13 @@ RSpec.configure do |config|
     homesick.stub(:say_status)
   end
 
-  def given_castle(path, subdirs=[])
+  def given_castle(path, subdirs = [])
     name = Pathname.new(path).basename
     castles.directory(path) do |castle|
       Dir.chdir(castle) do
         system 'git init >/dev/null 2>&1'
         system "git remote add origin git://github.com/technicalpickles/#{name}.git >/dev/null 2>&1"
-        if subdirs then
+        if subdirs
           subdir_file = castle.join(Homesick::SUBDIR_FILENAME)
           subdirs.each do |subdir|
             system "echo #{subdir} >> #{subdir_file}"