src/vs/editor/common/core/textChange.ts/TextChange/toString
class TextChange:	public toString(): string {
		if (this.oldText.length === 0) {
			return `(insert@${this.oldPosition} "${escapeNewLine(this.newText)}")`;
		}
		if (this.newText.length === 0) {
			return `(delete@${this.oldPosition} "${escapeNewLine(this.oldText)}")`;
		}
		return `(replace@${this.oldPosition} "${escapeNewLine(this.oldText)}" with "${escapeNewLine(this.newText)}")`;
	}