Change for to .each instead, use multiple variable reassignment instead

Author: ArunSahadeo

chapters/sorting_searching/bubble/code/ruby/bubble.rb

@@ -1,20 +1,18 @@
 #!/usr/bin/env ruby
 
 def bubble_sort(arr)
-	for i in 0..arr.length - 1
-		for k in 0..arr.length - 2
+	(0..arr.length - 1).each do
+		(0..arr.length - 2).each do |k|
 			if arr[k] > arr[k + 1]
-				temp = arr[k + 1]
-				arr[k + 1] = arr[k]
-				arr[k] = temp
+				arr[k + 1], arr[k] = arr[k], arr[k + 1]
 			end
 		end
 	end
 
 	return arr
 end
 
-def main()
+def main
 	range = [200, 79, 69, 45, 32, 5, 15, 88, 620, 125]	
 	puts "The range before sorting is #{range}"
 	range = bubble_sort(range)