Apply some concerns to operator<< test case
Apply some concerns to operator<< test case

bloomberg/bde-allocator-benchmarks,bloomberg/bde-allocator-benchmarks,gbleaney/Allocator-Benchmarks,frutiger/bde,dharesign/bde,dharesign/bde,mversche/bde,osubboo/bde,frutiger/bde,che2/bde,apaprocki/bde,saxena84/bde,minhlongdo/bde,bloomberg/bde,jmptrader/bde,che2/bde,jmptrader/bde,gbleaney/Allocator-Benchmarks,osubboo/bde,frutiger/bde,minhlongdo/bde,bloomberg/bde,RMGiroux/bde-allocator-benchmarks,bowlofstew/bde,mversche/bde,bowlofstew/bde,bloomberg/bde,mversche/bde,bloomberg/bde,bloomberg/bde-allocator-benchmarks,mversche/bde,idispatch/bde,bowlofstew/bde,jmptrader/bde,dbremner/bde,gbleaney/Allocator-Benchmarks,saxena84/bde,apaprocki/bde,idispatch/bde,dbremner/bde,jmptrader/bde,dbremner/bde,che2/bde,dharesign/bde,dharesign/bde,osubboo/bde,RMGiroux/bde-allocator-benchmarks,osubboo/bde,bowlofstew/bde,RMGiroux/bde-allocator-benchmarks,saxena84/bde,che2/bde,bloomberg/bde,bloomberg/bde-allocator-benchmarks,RMGiroux/bde-allocator-benchmarks,apaprocki/bde,frutiger/bde,minhlongdo/bde,minhlongdo/bde,idispatch/bde,bloomberg/bde-allocator-benchmarks,saxena84/bde,idispatch/bde,apaprocki/bde,gbleaney/Allocator-Benchmarks,dbremner/bde,RMGiroux/bde-allocator-benchmarks,apaprocki/bde