added test for sequencing nested generator streams
added test for sequencing nested generator streams

Whoaa512/highland,vqvu/highland,kwangkim/highland,svozza/highland,kwangkim/highland,caolan/highland,kjvalencik/highland,dayoadeyemi/highland,surgeforward/highland,svozza/highland,quarterto/highland,icio/highland,jgrund/highland,icio/highland,Whoaa512/highland,dayoadeyemi/highland,vqvu/highland,megawac/highland,Andolamin/highland,Andolamin/highland,megawac/highland,jgrund/highland,kjvalencik/highland,surgeforward/highland,caolan/highland