Remove dollar sign in command

[kianmeng]

Easier for developer to copy and paste and reduce noise when reading.

See https://cirosantilli.com/markdown-style-guide/#dollar-signs-in-shell-code

[coveralls]

Pull Request Test Coverage Report for Build 7cb1c51dc3e9abaf2c21196a9cdb4e542e7719d3-PR-26

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 88.952%

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Totals
Change from base Build bd57013e08dd77482a8585fd92243755cb22f389:	0.0%
Covered Lines:	314
Relevant Lines:	353

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💛 - Coveralls

[kianmeng]

:partying_face: :partying_face: :partying_face: :partying_face: :partying_face: