diff --git a/atm.lua b/atm.lua
index a1c4944..588613f 100644
--- a/atm.lua
+++ b/atm.lua
@@ -41,33 +41,33 @@ local function unique()
 end
 
 function cash_fs(p_name)
-  local balance = exchange:get_balance(p_name)
-  local formspec =
-    'size[8,9]'..
-    'label[0,0;' .. p_name .. '\'s account]' ..
-    'label[0,1;Balance: ' .. balance .. ']' ..
-    --money
-    'list[detached:global_exchange;money;0,2;3,1;]'..
-    --player inventory
-    'list[current_player;main;0,4;8,4;]'..
-    --back button
-    back(0,8)
---print(formspec)
-  return formspec
+	local balance = exchange:get_balance(p_name)
+	local formspec =
+		'size[8,9]'..
+		'label[0,0;' .. p_name .. '\'s account]' ..
+		'label[0,1;Balance: ' .. balance .. ']' ..
+		--money
+		'list[detached:global_exchange;money;0,2;3,1;]'..
+		--player inventory
+		'list[current_player;main;0,4;8,4;]'..
+		--back button
+		back(0,8)
+	--print(formspec)
+	return formspec
 end
 
 function bills2balance(stack, p_name)
-  local bal = exchange:get_balance(p_name)
-  local name = stack:get_name()
-  local count = stack:get_count()
-  if name == 'currency:minegeld' then
-    bal = bal + count
-  elseif name == 'currency:minegeld_5' then
-    bal = bal + count * 5
-  elseif name == 'currency:minegeld_10' then
-    bal = bal + count * 10
-  end
-  return bal
+	local bal = exchange:get_balance(p_name)
+	local name = stack:get_name()
+	local count = stack:get_count()
+	if name == 'currency:minegeld' then
+		bal = bal + count
+	elseif name == 'currency:minegeld_5' then
+		bal = bal + count * 5
+	elseif name == 'currency:minegeld_10' then
+		bal = bal + count * 10
+	end
+	return bal
 end
 
 local function wire_fs(p_name)
diff --git a/exchange_machine.lua b/exchange_machine.lua
index 9fe8e9d..99284b2 100644
--- a/exchange_machine.lua
+++ b/exchange_machine.lua
@@ -198,66 +198,66 @@ minetest.after(0, function()
 			inv:add_item("main", item_name)
 			show_main(p_name, item_name)
 		end,
-  on_put = function(inv, listname, index, stack, player)
-    local p_name = player:get_player_name()
-    if listname == 'money' and minetest.get_item_group(stack:get_name(), 'minegeld') then
-      local old_balance = exchange:get_balance(p_name)
-      local balance = bills2balance(stack, p_name)
-      exchange:change_balance(p_name, balance - old_balance)
-      minetest.sound_play("atm_cash", {to_player = p_name})
-      local stacks = inv:get_list('money')
-      local tens = math.floor(balance/10)
-      if tens > 0 then
-        inv:set_stack('money', 1, 'currency:minegeld_10 ' .. tens)
-        balance = balance - tens * 10
-      else
-        inv:set_stack('money', 1, '')
-      end
-      local fives = math.floor(balance/5)
-      if fives > 0 then
-        inv:set_stack('money', 2, 'currency:minegeld_5 ' .. fives)
-        balance = balance - fives * 5
-      else
-        inv:set_stack('money', 2, '')
-      end
-      local ones = math.floor(balance)
-      if ones > 0 then
-        inv:set_stack('money', 3, 'currency:minegeld ' .. ones)
-        balance = balance - ones
-      else
-        inv:set_stack('money', 3, '')
-      end
-    end
-    minetest.show_formspec(p_name, "global_exchange:atm_form", cash_fs(p_name)) --redraw with new balance
-  end,
-  allow_put = function(inv, listname, index, stack, player)
-    local name = stack:get_name()
-    if listname == 'money' and minetest.get_item_group(name, 'minegeld') > 0 then
-      return stack:get_count()
-    end
-    return 0
-  end,
-  on_take = function(inv, listname, index, stack, player)
-    local p_name = player:get_player_name()
-    if listname == 'money' and minetest.get_item_group(stack:get_name(), 'minegeld') then
-      local name = stack:get_name()
-      local count = stack:get_count()
-      local delta
-      if name == 'currency:minegeld' then
-        delta = count
-      elseif name == 'currency:minegeld_5' then
-        delta = count * 5
-      elseif name == 'currency:minegeld_10' then
-        delta = count * 10
-      end
-      exchange:change_balance(p_name, -delta) --let's hope it always returns success
-      minetest.sound_play("atm_cash", {to_player = p_name})
-    end
-    minetest.show_formspec(p_name, "global_exchange:atm_form", cash_fs(p_name)) --redraw with new balance
-  end,
-  allow_take = function(inv, listname, index, stack, player)
-    return stack:get_count()
-  end,
+	on_put = function(inv, listname, index, stack, player)
+		local p_name = player:get_player_name()
+		if listname == 'money' and minetest.get_item_group(stack:get_name(), 'minegeld') then
+			local old_balance = exchange:get_balance(p_name)
+			local balance = bills2balance(stack, p_name)
+			exchange:change_balance(p_name, balance - old_balance)
+			minetest.sound_play("atm_cash", {to_player = p_name})
+			local stacks = inv:get_list('money')
+			local tens = math.floor(balance/10)
+			if tens > 0 then
+				inv:set_stack('money', 1, 'currency:minegeld_10 ' .. tens)
+				balance = balance - tens * 10
+			else
+				inv:set_stack('money', 1, '')
+			end
+			local fives = math.floor(balance/5)
+			if fives > 0 then
+				inv:set_stack('money', 2, 'currency:minegeld_5 ' .. fives)
+				balance = balance - fives * 5
+			else
+				inv:set_stack('money', 2, '')
+			end
+			local ones = math.floor(balance)
+			if ones > 0 then
+				inv:set_stack('money', 3, 'currency:minegeld ' .. ones)
+				balance = balance - ones
+			else
+				inv:set_stack('money', 3, '')
+			end
+		end
+		minetest.show_formspec(p_name, "global_exchange:atm_form", cash_fs(p_name)) --redraw with new balance
+	end,
+	allow_put = function(inv, listname, index, stack, player)
+		local name = stack:get_name()
+		if listname == 'money' and minetest.get_item_group(name, 'minegeld') > 0 then
+			return stack:get_count()
+		end
+		return 0
+	end,
+	on_take = function(inv, listname, index, stack, player)
+		local p_name = player:get_player_name()
+		if listname == 'money' and minetest.get_item_group(stack:get_name(), 'minegeld') then
+			local name = stack:get_name()
+			local count = stack:get_count()
+			local delta
+			if name == 'currency:minegeld' then
+				delta = count
+			elseif name == 'currency:minegeld_5' then
+				delta = count * 5
+			elseif name == 'currency:minegeld_10' then
+				delta = count * 10
+			end
+			exchange:change_balance(p_name, -delta) --let's hope it always returns success
+			minetest.sound_play("atm_cash", {to_player = p_name})
+		end
+		minetest.show_formspec(p_name, "global_exchange:atm_form", cash_fs(p_name)) --redraw with new balance
+	end,
+	allow_take = function(inv, listname, index, stack, player)
+		return stack:get_count()
+	end,
 	})
 
 	local selectable_list,n = {},1