Node 8.0 New Symbols And Adding Space After Symbol For Number.prototype.toLocaleString()

I just updated to Node v8.0 and noticed that Number.prototype.toLocaleString() with options style: 'currency' and also currency set to any currency behaves differently than any other environment. In Node v7.2.1 and also Chrome v58.0 my output would look like $5.00, but in Node 8 it's showing with different currency symbol and extra space as US$ 5.00. Is this just an update? Where would I find docs for this? Did Node just decide to update toLocaleString and it should be treated as a function that changes based on environment?

const value = 5

value.toLocaleString('en-US', { style: 'currency', currency: 'USD' })

Node 8.0

'US$ 5.00'

Node < 8.0 + Chrome

'$5.00'

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