Merge branch 'master' into remove-test-dep

src/lib/builtins/mod.rs

src/lib/lib.rs

src/lib/shell/binary/mod.rs

src/lib/shell/directory_stack.rs

src/lib/shell/fork_function.rs

src/lib/shell/mod.rs

src/lib/shell/pipe_exec/job_control.rs

src/lib/shell/pipe_exec/mod.rs

src/main.rs