Alias values containing logical operator only executes the first operand.

Created by: ishanjain28

Reproduction:

alias test=mkdir ~/iontest && rmdir ~/iontest
test

Expected behavior: Create a iontest folder in home directory and then delete it.

Actual behavior: [describe the actual behavior, which is presented through the repro.]. Creates the directory but doesn't deletes it.

Build information:

rustc -V rustc 1.25.0-nightly (3ec5a99aa 2018-02-14)
git rev-parse HEAD 96d5b5d2ef53d8d9e93a4a41019560175cc12598
qemu-i386 -version 2.11.1
uname -a: Linux y50 4.15.9-1-ARCH #1 SMP PREEMPT Sun Mar 11 17:54:33 UTC 2018 x86_64     GNU/Linux
Ion version: ion 1.0.0-alpha (x86_64-unknown-linux-gnu) rev 6d5b5d2ef53d8d9e93a4a41019560175cc12598