False negativ

[StephanHoyer]

const isSvg = require("is-svg")

// svg from 'https://upload.wikimedia.org/wikipedia/commons/0/0e/Biochem_reaction_arrow_forward_NNNN_horiz_med.svg'

const svg = `
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<svg
xmlns="http://www.w3.org/2000/svg"
width="75"
height="75"
version="1.1"
><g>
<path
style="fill:#000000;stroke:none"
d="m 67,34.5 0,2 -67,0 0,2 67,0 0,2 8,-3 -8,-3 z"
/></g>
</svg>
`

isSvg(svg) // false but should be true

line breaks are the problem I think.