Function isDoubleQuote

src/utils/valueSyntax.ts:587–589

(ch: string | undefined)

const DOUBLE_QUOTE_CHARS = new Set(['"', "“", "”"]);

function isDoubleQuote(ch: string | undefined): boolean {
	return ch !== undefined && DOUBLE_QUOTE_CHARS.has(ch);
}

// Horizontal whitespace only (space, tab, NBSP, other Unicode spaces) — NOT
// line breaks. VALUE tokens never contain newlines (constants.ts VARIABLE_REGEX