Update walls-and-gates.py

Author: kamyu104

Python/walls-and-gates.py

@@ -14,8 +14,8 @@ def wallsAndGates(self, rooms):
  while q:
  (i, j) = q.popleft()
  for I, J in (i+1, j), (i-1, j), (i, j+1), (i, j-1):
- if 0 <= I < len(rooms) and 0 <= J < len(rooms[0]) \
- and rooms[I][J] == INF:
+ if 0 <= I < len(rooms) and 0 <= J < len(rooms[0]) and \
+ rooms[I][J] == INF:
  rooms[I][J] = rooms[i][j] + 1
  q.append((I, J))