src/vs/base/node/terminalEncoding.ts/toIconvLiteEncoding
function toIconvLiteEncoding(encodingName: string): string {
	const normalizedEncodingName = encodingName.replace(/[^a-zA-Z0-9]/g, '').toLowerCase();
	const mapped = JSCHARDET_TO_ICONV_ENCODINGS[normalizedEncodingName];

	return mapped || normalizedEncodingName;
}