print: use bytes for spaces/tabs
print: use bytes for spaces/tabs

name      old time/op    new time/op    delta
Fprint-4    12.5µs ± 1%    11.1µs ± 2%  -11.11%          (p=0.004 n=5+6)

mvdan/sh,mvdan/sh,mvdan/sh,mvdan/sh