Bug: Improper pathname parsing in `nspawn` function

[gitaalekhyapaul]

Bug Description:

The pathname parsing in nspawn function does not take into consideration spaces in the pathname.

Consider the following pathname of a CLI application: /home/user/Project Folder/Sub Folder/bin/cli (note the spaces in the pathname)

In the lines 360-362 in nexpect.js, we can see the following code:

Suppose we consider our above pathname, we can clearly observe:

• command will be: /home/user/Project
• params will be: params OR [ "Folder/Sub" , "Folder/bin/cli" ]

This leads to improper pathanme parsing and errors in testing.

Expected Behaviour:

The pathname should be parsed properly even if it contains spaces in it.

[gitaalekhyapaul]

A detailed description of this issue can be found here: aws-amplify/amplify-cli#7324