src/vs/base/common/diff/diff.ts/LcsDiff/_contiguousSequenceScore
class LcsDiff:	private _contiguousSequenceScore(originalStart: number, modifiedStart: number, length: number): number {
		let score = 0;
		for (let l = 0; l < length; l++) {
			if (!this.ElementsAreEqual(originalStart + l, modifiedStart + l)) {
				return 0;
			}
			score += this._originalStringElements[originalStart + l].length;
		}
		return score;
	}