Avoid allocation if appending CharSequence that is really a StringBuilder.
Avoid allocation if appending CharSequence that is really a StringBuilder.

#3072

andyvand/libgdx,1yvT0s/libgdx,UnluckyNinja/libgdx,KrisLee/libgdx,JDReutt/libgdx,kotcrab/libgdx,saqsun/libgdx,stickyd/libgdx,js78/libgdx,SidneyXu/libgdx,1yvT0s/libgdx,djom20/libgdx,josephknight/libgdx,JFixby/libgdx,xranby/libgdx,toa5/libgdx,ninoalma/libgdx,gouessej/libgdx,MetSystem/libgdx,MovingBlocks/libgdx,bgroenks96/libgdx,titovmaxim/libgdx,Senth/libgdx,Badazdz/libgdx,Zonglin-Li6565/libgdx,FredGithub/libgdx,fiesensee/libgdx,js78/libgdx,Gliby/libgdx,haedri/libgdx-1,jsjolund/libgdx,andyvand/libgdx,gdos/libgdx,ThiagoGarciaAlves/libgdx,billgame/libgdx,jsjolund/libgdx,ya7lelkom/libgdx,kagehak/libgdx,realitix/libgdx,samskivert/libgdx,tommycli/libgdx,firefly2442/libgdx,ricardorigodon/libgdx,alireza-hosseini/libgdx,1yvT0s/libgdx,Heart2009/libgdx,ThiagoGarciaAlves/libgdx,stickyd/libgdx,sjosegarcia/libgdx,Heart2009/libgdx,alireza-hosseini/libgdx,fwolff/libgdx,sjosegarcia/libgdx,tommyettinger/libgdx,ya7lelkom/libgdx,kotcrab/libgdx,Senth/libgdx,gdos/libgdx,alex-dorokhov/libgdx,xoppa/libgdx,toa5/libgdx,stinsonga/libgdx,libgdx/libgdx,FredGithub/libgdx,gf11speed/libgdx,MovingBlocks/libgdx,FredGithub/libgdx,srwonka/libGdx,bsmr-java/libgdx,zommuter/libgdx,PedroRomanoBarbosa/libgdx,309746069/libgdx,stinsonga/libgdx,cypherdare/libgdx,jsjolund/libgdx,ThiagoGarciaAlves/libgdx,fwolff/libgdx,ya7lelkom/libgdx,jsjolund/libgdx,zommuter/libgdx,jasonwee/libgdx,andyvand/libgdx,ninoalma/libgdx,antag99/libgdx,ya7lelkom/libgdx,samskivert/libgdx,MetSystem/libgdx,stickyd/libgdx,czyzby/libgdx,NathanSweet/libgdx,sarkanyi/libgdx,jberberick/libgdx,Gliby/libgdx,copystudy/libgdx,JFixby/libgdx,nave966/libgdx,Xhanim/libgdx,revo09/libgdx,petugez/libgdx,libgdx/libgdx,zommuter/libgdx,designcrumble/libgdx,MikkelTAndersen/libgdx,Zomby2D/libgdx,MetSystem/libgdx,anserran/libgdx,sjosegarcia/libgdx,nrallakis/libgdx,BlueRiverInteractive/libgdx,djom20/libgdx,xranby/libgdx,copystudy/libgdx,luischavez/libgdx,Wisienkas/libgdx,Dzamir/libgdx,srwonka/libGdx,flaiker/libgdx,czyzby/libgdx,mumer92/libgdx,copystudy/libgdx,czyzby/libgdx,alireza-hosseini/libgdx,Zonglin-Li6565/libgdx,jasonwee/libgdx,zommuter/libgdx,saltares/libgdx,thepullman/libgdx,noelsison2/libgdx,309746069/libgdx,fiesensee/libgdx,MetSystem/libgdx,jberberick/libgdx,andyvand/libgdx,gf11speed/libgdx,firefly2442/libgdx,xpenatan/libgdx-LWJGL3,ninoalma/libgdx,JFixby/libgdx,samskivert/libgdx,titovmaxim/libgdx,ricardorigodon/libgdx,tell10glu/libgdx,antag99/libgdx,del-sol/libgdx,ninoalma/libgdx,collinsmith/libgdx,Deftwun/libgdx,ttencate/libgdx,FredGithub/libgdx,ya7lelkom/libgdx,xpenatan/libgdx-LWJGL3,Wisienkas/libgdx,Badazdz/libgdx,hyvas/libgdx,titovmaxim/libgdx,ztv/libgdx,cypherdare/libgdx,djom20/libgdx,FyiurAmron/libgdx,shiweihappy/libgdx,revo09/libgdx,czyzby/libgdx,gouessej/libgdx,shiweihappy/libgdx,kagehak/libgdx,Badazdz/libgdx,alireza-hosseini/libgdx,czyzby/libgdx,bsmr-java/libgdx,alex-dorokhov/libgdx,flaiker/libgdx,TheAks999/libgdx,ttencate/libgdx,nave966/libgdx,Zonglin-Li6565/libgdx,309746069/libgdx,Deftwun/libgdx,katiepino/libgdx,ThiagoGarciaAlves/libgdx,Thotep/libgdx,GreenLightning/libgdx,gouessej/libgdx,bgroenks96/libgdx,TheAks999/libgdx,gouessej/libgdx,sarkanyi/libgdx,xpenatan/libgdx-LWJGL3,Dzamir/libgdx,zommuter/libgdx,del-sol/libgdx,Dzamir/libgdx,yangweigbh/libgdx,xranby/libgdx,ninoalma/libgdx,PedroRomanoBarbosa/libgdx,Xhanim/libgdx,djom20/libgdx,ricardorigodon/libgdx,Dzamir/libgdx,flaiker/libgdx,katiepino/libgdx,Heart2009/libgdx,gouessej/libgdx,ttencate/libgdx,curtiszimmerman/libgdx,TheAks999/libgdx,gdos/libgdx,collinsmith/libgdx,ztv/libgdx,bladecoder/libgdx,Senth/libgdx,thepullman/libgdx,Xhanim/libgdx,MadcowD/libgdx,UnluckyNinja/libgdx,designcrumble/libgdx,snovak/libgdx,toloudis/libgdx,Deftwun/libgdx,kagehak/libgdx,cypherdare/libgdx,bgroenks96/libgdx,flaiker/libgdx,petugez/libgdx,snovak/libgdx,xpenatan/libgdx-LWJGL3,srwonka/libGdx,ricardorigodon/libgdx,luischavez/libgdx,luischavez/libgdx,GreenLightning/libgdx,Senth/libgdx,MadcowD/libgdx,Senth/libgdx,xpenatan/libgdx-LWJGL3,MadcowD/libgdx,anserran/libgdx,ztv/libgdx,Dzamir/libgdx,gf11speed/libgdx,alex-dorokhov/libgdx,Wisienkas/libgdx,alireza-hosseini/libgdx,samskivert/libgdx,realitix/libgdx,yangweigbh/libgdx,gf11speed/libgdx,KrisLee/libgdx,petugez/libgdx,Thotep/libgdx,bsmr-java/libgdx,SidneyXu/libgdx,curtiszimmerman/libgdx,Thotep/libgdx,MadcowD/libgdx,kagehak/libgdx,nudelchef/libgdx,mumer92/libgdx,Heart2009/libgdx,nudelchef/libgdx,JDReutt/libgdx,ttencate/libgdx,FredGithub/libgdx,UnluckyNinja/libgdx,collinsmith/libgdx,KrisLee/libgdx,ya7lelkom/libgdx,ztv/libgdx,GreenLightning/libgdx,jasonwee/libgdx,SidneyXu/libgdx,jberberick/libgdx,snovak/libgdx,hyvas/libgdx,Heart2009/libgdx,NathanSweet/libgdx,1yvT0s/libgdx,jberberick/libgdx,josephknight/libgdx,shiweihappy/libgdx,MovingBlocks/libgdx,realitix/libgdx,yangweigbh/libgdx,Thotep/libgdx,bladecoder/libgdx,Gliby/libgdx,Gliby/libgdx,czyzby/libgdx,tommycli/libgdx,luischavez/libgdx,gf11speed/libgdx,ya7lelkom/libgdx,fiesensee/libgdx,JDReutt/libgdx,toloudis/libgdx,stinsonga/libgdx,PedroRomanoBarbosa/libgdx,Heart20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