Function add

extensions/copilot/src/util/common/markdown.ts:30–35

(lineComment: { start: string; end?: string })

	const prefixes: string[] = ['#', '\\/\\/']; // always allow # and // as comment start
	const suffixes: string[] = [];
	function add(lineComment: { start: string; end?: string }) {
		prefixes.push(escapeRegExpCharacters(lineComment.start));
		if (lineComment.end) {
			suffixes.push(escapeRegExpCharacters(lineComment.end));
		}
	}
	add(language.lineComment);
	language.alternativeLineComments?.forEach(add);
	const startMatch = `(?:${prefixes.join('|')})`;