Update min-cost-string-conversion.py

Author: daniel-s-ingram

strings/min-cost-string-conversion.py

@@ -1,7 +1,7 @@
 from __future__ import print_function
 
 try:
-	xrange			#Python 2
+	xrange		#Python 2
 except NameError:
 	xrange = range	#Python 3
 
@@ -120,4 +120,4 @@ def assemble_transformation(ops, i, j):
 	print('Cost: ', cost)
 
 	file.write('\r\nMinimum cost: ' + str(cost))
-	file.close()
+	file.close()