Sprinkle frozen string literal & Indentation Fix (#150)

* Avoid extra string alocation as join will always return string

* Fix indentation

* Sprinkle frozen string literal true

app/builders/account_builder.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class AccountBuilder
   include CustomExceptions::Account
 
@@ -59,7 +61,6 @@ class AccountBuilder
     else
       raise UserErrors.new({errors: @user.errors})
     end
-
   end
 
   def email_to_name(email)
@@ -67,5 +68,4 @@ class AccountBuilder
     name.split(".").map {|n| n.capitalize }.join(" ")
   end
 
-
 end