Transform terminator to an iterator of bytes

members/lexers/src/arguments.rs

src/lib/builtins/mod.rs

src/lib/parser/assignments/checker.rs

src/lib/parser/quotes.rs

src/lib/parser/shell_expand/mod.rs

src/lib/shell/assignments.rs

src/lib/shell/binary/mod.rs

src/lib/shell/binary/readln.rs

src/lib/shell/binary/terminate.rs

src/lib/shell/flow.rs

src/lib/shell/mod.rs

src/lib/shell/pipe_exec/mod.rs

src/lib/shell/variables/mod.rs

src/main.rs