This module treats Bytes data as holding ASCII text. Providing bytes
outside the ASCII range (U+0000 -- U+007F) may cause a failure or
unspecified results, but such bytes will never be inspected.
For functions that can operate on ASCII-compatible encodings, see
AsciiExt.
Convert a String consisting of only characters in the ASCII block
to a byte sequence. Any character with a codepoint above U+007F is
replaced by U+0000.