Check if E00/B00 behaviour as documented is accurate

[bbqsrc]

@snomos: just noted in the kbdgen docs: «kbdgen supports E00–E12, D01–D12, C01–C12, and B00–10 as per traditional European ISO standard keyboards. In practice, for ANSI keyboards, C12 moves to D13, and B00 is simply dropped altogether. B11 is not used on any modern keyboard, and E13 is largely ignored.»

Isn’t it so that B00 is moved to E00, and E00 is dropped?

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Need to check.