Re: parallel bootstrap failure; _prompt_? during bootstrap build

[Richard Stallman]

    If my keyboard input is in some specific encoding, that generally
    means my text files, in particular those I feed instead of keyboard
    input, will tend to be encoded the same way.

All your keyboard input comes from you, but the files on your system
were not all written by you.  That is why Emacs tries to determine
the encoding of a file.  It does not follow keyboard-coding-system.