code: def maxind_numba(block):
      
      ## remove terminal edges
      inds = 0
      for row in xrange(block.shape[0]):
          where = np.where(block[row] != 45)[0]
          if len(where) == 0:
              obs = 100
          else:
              left = np.min(where)
              right = np.max(where)
              obs = np.sum(block[row, left:right] == 45)
          if obs > inds:
              inds = obs
      return inds
docs: filter for indels