Code review comment for lp://staging/~dylanmccall/update-manager/refactored-cellareapackage

A few comments:

Line 51: s/not cell_number in/cell_number not in/

Line 104: I factored out the "len(cells) - 1" into a local variable outside the loop for readability and (possibly) improved performance.

Lines 105-108 can be better written as:
    cell_size = self.cached_cell_size.get(cell_number, 0)

Line 110: Removed unnecessary parens.

I'll fix those and sponsor this into trunk (and upload) along with your LP: #1105363 fix.