Fix typo in mergedicts_copy docstring
Fix typo in mergedicts_copy docstring

wfscheper/powerline,areteix/powerline,bartvm/powerline,QuLogic/powerline,darac/powerline,junix/powerline,xfumihiro/powerline,IvanAli/powerline,xfumihiro/powerline,magus424/powerline,dragon788/powerline,xxxhycl2010/powerline,prvnkumar/powerline,Liangjianghao/powerline,QuLogic/powerline,Liangjianghao/powerline,magus424/powerline,darac/powerline,xfumihiro/powerline,kenrachynski/powerline,firebitsbr/powerline,bezhermoso/powerline,IvanAli/powerline,QuLogic/powerline,DoctorJellyface/powerline,areteix/powerline,lukw00/powerline,s0undt3ch/powerline,S0lll0s/powerline,dragon788/powerline,wfscheper/powerline,kenrachynski/powerline,Liangjianghao/powerline,cyrixhero/powerline,bartvm/powerline,s0undt3ch/powerline,darac/powerline,kenrachynski/powerline,S0lll0s/powerline,russellb/powerline,firebitsbr/powerline,bezhermoso/powerline,bartvm/powerline,Luffin/powerline,EricSB/powerline,seanfisk/powerline,EricSB/powerline,cyrixhero/powerline,prvnkumar/powerline,lukw00/powerline,S0lll0s/powerline,seanfisk/powerline,firebitsbr/powerline,prvnkumar/powerline,Luffin/powerline,bezhermoso/powerline,russellb/powerline,junix/powerline,xxxhycl2010/powerline,junix/powerline,dragon788/powerline,cyrixhero/powerline,DoctorJellyface/powerline,seanfisk/powerline,russellb/powerline,s0undt3ch/powerline,EricSB/powerline,IvanAli/powerline,blindFS/powerline,areteix/powerline,DoctorJellyface/powerline,wfscheper/powerline,Luffin/powerline,xxxhycl2010/powerline,blindFS/powerline,blindFS/powerline,magus424/powerline,lukw00/powerline