src/vs/base/common/diff/diff.ts/LcsDiff/_OriginalIsBoundary
class LcsDiff:	private _OriginalIsBoundary(index: number): boolean {
		if (index <= 0 || index >= this._originalElementsOrHash.length - 1) {
			return true;
		}
		return (this._hasStrings && /^\s*$/.test(this._originalStringElements[index]));
	}