message: Update longest-palindromic-subsequence.py
diff: @@ -7,7 +7,7 @@ class Solution(object):
  :type s: str
  :rtype: int
  """
  - if s == s[::-1]:
  + if s == s[::-1]: # optional, to optimize special case
  return len(s)
  dp = [[1] * len(s) for _ in xrange(2)]
  