fix: incorporate missing spaces in 'list command' help text

[dec0dOS]

Proposed changes

In the current implementation, as illustrated in the example, the output is generated as follows:

 The list command displays a list of all the commands:
    node acelist

To rectify this, the implementation has been modified to produce the following output:

 The list command displays a list of all the commands:
    node ace list

Types of changes

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• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist

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• I have read the CONTRIBUTING doc
• Lint and unit tests pass locally with my changes
• I have added tests that prove my fix is effective or that my feature works.
• I have added necessary documentation (if appropriate)

[thetutlage]

Hey, can you please also update the tests?

[thetutlage]

Thanks 😄