The old observatory was destroyed in a "devastating fire" on 23 June 2021.
"I don't feel he's gone yet - I still feel he'll be back soon," she tells us. "In my mind, he's in his school uniform. He'll return, swinging his bag."，这一点在新收录的资料中也有详细论述
Integrity hashes: Opt-in，这一点在PDF资料中也有详细论述
(for example, narrowing an I64 op to U32 when one operand came from