src/vs/editor/common/model/pieceTreeTextBuffer/pieceTreeBase.ts/PieceTreeBase/validateCRLFWithPrevNode
class PieceTreeBase:	private validateCRLFWithPrevNode(nextNode: TreeNode) {
		if (this.shouldCheckCRLF() && this.startWithLF(nextNode)) {
			const node = nextNode.prev();
			if (this.endWithCR(node)) {
				this.fixCRLF(node, nextNode);
			}
		}
	}