Fix spacing.

vagrant/vagrantplugins.rb

@@ -6,28 +6,28 @@ end
 
 def install_plugins(plugins)
     if not is_check_necessary
-	exit
+        exit
     end
 
     not_installed = get_not_installed(plugins)
     if not_installed.any?
-	puts "The following required plugins must be installed:"
-	puts "'#{not_installed.join("', '")}'"
-	print "Install? [y]/n: "
-	unless STDIN.gets.chomp == "n"
-	    not_installed.each { |plugin| install_plugin(plugin) }
-    	else
-      	    exit
-    	end
-    	$? ? continue : raise('Plugin installation failed, see errors above.')
+        puts "The following required plugins must be installed:"
+        puts "'#{not_installed.join("', '")}'"
+        print "Install? [y]/n: "
+        unless STDIN.gets.chomp == "n"
+            not_installed.each { |plugin| install_plugin(plugin) }
+        else
+            exit
+        end
+        $? ? continue : raise('Plugin installation failed, see errors above.')
     end
 end
 
 def get_not_installed(plugins)
     not_installed = []
     plugins.each do |plugin|
-	unless Vagrant.has_plugin?(plugin)
-	    not_installed << plugin
+        unless Vagrant.has_plugin?(plugin)
+            not_installed << plugin
         end
     end
     return not_installed