@@ 1,6 1,6 @@ 
-local BankAccount = {}
+local ba = {}
 
-function BankAccount:new()
+function ba:new()
   local account = {
     current_bal = 0,
     closed = false

          
@@ 10,16 10,16 @@ function BankAccount:new()
   return account
 end
 
-function BankAccount:balance()
+function ba:balance()
   return self.current_bal
 end
 
-function BankAccount:deposit(amount)
+function ba:deposit(amount)
   assert(not self.closed and amount > 0)
   self.current_bal = self.current_bal + amount
 end
 
-function BankAccount:withdraw(amount)
+function ba:withdraw(amount)
   assert(amount > 0 and
     amount < self.current_bal and
     not self.closed and

          
@@ 28,8 28,8 @@ function BankAccount:withdraw(amount)
   self.current_bal = self.current_bal - amount
 end
 
-function BankAccount:close()
+function ba:close()
   self.closed = true
 end
 
-return BankAccount
+return ba

          

@@ 12,7 12,7 @@ end
 function rle.decode(input)
   local dec = ""
   for n, c in input:gmatch("(%d*)(%D)") do
-    dec= dec.. c:rep(n == "" and 1 or tonumber(n))
+    dec = dec .. c:rep(n == "" and 1 or tonumber(n))
   end
   return dec
 end