src/vs/workbench/contrib/mergeEditor/browser/model/mapping.ts/RangeMapping/toString
class RangeMapping:	toString(): string {
		function rangeToString(range: Range) {
			// TODO@hediet make this the default Range.toString
			return `[${range.startLineNumber}:${range.startColumn}, ${range.endLineNumber}:${range.endColumn})`;
		}

		return `${rangeToString(this.inputRange)} -> ${rangeToString(this.outputRange)}`;
	}