src/vs/workbench/contrib/terminal/browser/terminalTypeAheadAddon.ts/PredictionStats/accuracy
class PredictionStats:	get accuracy() {
		let correctCount = 0;
		for (const [, correct] of this._stats) {
			if (correct) {
				correctCount++;
			}
		}

		return correctCount / (this._stats.length || 1);
	}