Update editDistance.py

Author: kanglicheng

DP/editDistance.py

@@ -1,6 +1,6 @@
 class Solution(object):
  def minDistance(self, word1, word2):
- l 1= len(word1) + 1
+ l1= len(word1) + 1
  l2 = len(word2) + 1
 
  dp = [[0 for b in xrange(l2)] for c in xrange(l1)]