Update standard libraries and update code accordingly

[mbargiel]

This PR updates the standard and standard-markdown and updates the code and docs accordingly (in the example code snippets).

Two types of changes were made:

• Spaces inside { and } (e.g. { key: value } rather than {key: value}
• Extra Indentation when chaining promises over multiple lines (in example code only)

This is a fix for #631.

[mbargiel]

Note: this PR should be merged before #633 (because 633 will need a minor update due to the spacing rule changes in the latest standard rules)

[mbargiel]

Oh hey, my PR is almost an exact copy of #624, except:

• this PR is a single commit
• this PR also fixed a typo in a comment
• this PR fixed assert.equals with assert.strictEquals rather than assert.strict.equals
• this PR bumps standard-markdown to ^5.0.1 rather than ^5.0.0

[RyanZim]

Will need rebased after v8 is merged, see #648 for more details.