Make test compile on older compilers.
Make test compile on older compilers.
Jopie64/cppformat,wangshijin/cppformat,Jopie64/cppformat,cppformat/cppformat,seungrye/cppformat,seungrye/cppformat,nelson4722/cppformat,alabuzhev/fmt,alabuzhev/fmt,seungrye/cppformat,dean0x7d/cppformat,cppformat/cppformat,nelson4722/cppformat,mojoBrendan/fmt,alabuzhev/fmt,dean0x7d/cppformat,lightslife/cppformat,wangshijin/cppformat,cppformat/cppformat,nelson4722/cppformat,dean0x7d/cppformat,blaquee/cppformat,lightslife/cppformat,lightslife/cppformat,mojoBrendan/fmt,blaquee/cppformat,Jopie64/cppformat,blaquee/cppformat,wangshijin/cppformat,mojoBrendan/fmt