Replaced spaces with tabs.

Check CONTRIBUTING.md, guys!

tetris/randomizers/bag7noSZOstart.lua

@@ -3,27 +3,27 @@ local Randomizer = require 'tetris.randomizers.randomizer'
 local Bag7NoSZOStartRandomizer = Randomizer:extend()
 
 function Bag7NoSZOStartRandomizer:shuffleBag()
-    local b = self.bag
-    local ln = #b
-    for i = 1, ln do
-        local j = math.random(i, ln)
-        b[i], b[j] = b[j], b[i]
-    end
+	local b = self.bag
+	local ln = #b
+	for i = 1, ln do
+		local j = math.random(i, ln)
+		b[i], b[j] = b[j], b[i]
+	end
 end
 
 local function isnotSZO(x) return not(x == "S" or x == "Z" or x == "O") end 
 
 function Bag7NoSZOStartRandomizer:initialize()
 	self.bag = {"I", "J", "L", "O", "S", "T", "Z"}
-    repeat
-        self:shuffleBag()
-    until isnotSZO(self.bag[7])
+	repeat
+		self:shuffleBag()
+	until isnotSZO(self.bag[7])
 end
 
 function Bag7NoSZOStartRandomizer:generatePiece()
 	if #self.bag == 0 then
 		self.bag = {"I", "J", "L", "O", "S", "T", "Z"}
-        self:shuffleBag()
+		self:shuffleBag()
 	end
 	return table.remove(self.bag)
 end