fix a bug of execution of diff.
fix a bug of execution of diff.

treefrogframework/treefrog-framework,treefrogframework/treefrog-framework,treefrogframework/treefrog-framework,AmiArt/treefrog-framework,treefrogframework/treefrog-framework,treefrogframework/treefrog-framework,AmiArt/treefrog-framework,AmiArt/treefrog-framework,AmiArt/treefrog-framework,AmiArt/treefrog-framework