extendHex not working properly

[flxwu]

This is the snippet I created once, but someone has rewritten it wrongly.
extendHex(03f) should return #0033ff, but currently returns #03f03f .

The problem was here:

shortHex.slice(shortHex.startsWith('#') ? 1 : 0).split().map(x => x+x).join()

but should be

shortHex.slice(shortHex.startsWith('#') ? 1 : 0).split('').map(x => x+x).join('')

Is fixed in my PR #224

[lock]

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