Fixes for the mac documentation

[bddicken]

A few small fixes for the Mac install page:

• Use regular quotes instead of smart quotes
• Remove two non-displaying characters
• use ${HOME} instead of /Users/jason
• Remove $

[bddicken]

Also, this PR does not include changes to the docs in content/en/docs/archive/ but if you'd like me to update those as well just let me know.

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