vi: a few trivial optimizations to keyboard reading code; bump timeout to 50s.

function                                             old     new   delta
edit_file                                            901     912     +11
count_lines                                           74      72      -2
readit                                               306     289     -17
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(add/remove: 0/0 grow/shrink: 1/2 up/down: 11/-19)             Total: -8 bytes

1 file changed