censor: remove meaningless explanation about .hgcensored There is no code path handling ".hgcensored" in Mercurial source tree. This meaningless explanation may make users misunderstand about censor.

parsers: avoid signed integer overflow in calculation of leaf-node index If v = -INT_MAX - 1, -v would exceed INT_MAX. I don't think this would cause problems such as issue4627, but we can't blame it as a compiler bug because signed integer overflow is undefined in C.