Method replacer

benchmark/data.js:411–415

(match)

		}
		let shouldIndentNextCharacter = options.indentStart !== false;
		const replacer = (match) => {
			if (shouldIndentNextCharacter) return `${indentStr}${match}`;
			shouldIndentNextCharacter = true;
			return match;
		};
		this.intro = this.intro.replace(pattern, replacer);
		let charIndex = 0;
		let chunk = this.firstChunk;