constitem=newTreeItem(`Comparing ${GitService.shortenSha(this.ref1)} to ${this.ref2!==''?GitService.shortenSha(this.ref2):'Working Tree'}${repository}`,TreeItemCollapsibleState.Expanded);
constitem=newTreeItem(`Comparing ${GitService.shortenSha(this.ref1,{working:'Working Tree'})} to ${GitService.shortenSha(this.ref2,{working:'Working Tree'})}${repository}`,TreeItemCollapsibleState.Expanded);