Fix slow InternedString copy constructor
Fix slow InternedString copy constructor

xificurC/kakoune,mawww/kakoune,flavius/kakoune,jjthrash/kakoune,jkonecny12/kakoune,Somasis/kakoune,alexherbo2/kakoune,jkonecny12/kakoune,lenormf/kakoune,danr/kakoune,flavius/kakoune,xificurC/kakoune,danielma/kakoune,Somasis/kakoune,ekie/kakoune,lenormf/kakoune,danr/kakoune,danr/kakoune,alpha123/kakoune,xificurC/kakoune,zakgreant/kakoune,ekie/kakoune,Somasis/kakoune,flavius/kakoune,rstacruz/kakoune,elegios/kakoune,mawww/kakoune,alpha123/kakoune,occivink/kakoune,alexherbo2/kakoune,elegios/kakoune,jkonecny12/kakoune,mawww/kakoune,casimir/kakoune,occivink/kakoune,lenormf/kakoune,alpha123/kakoune,jkonecny12/kakoune,zakgreant/kakoune,occivink/kakoune,jjthrash/kakoune,flavius/kakoune,Asenar/kakoune,danielma/kakoune,jjthrash/kakoune,rstacruz/kakoune,danielma/kakoune,alexherbo2/kakoune,alpha123/kakoune,elegios/kakoune,zakgreant/kakoune,rstacruz/kakoune,zakgreant/kakoune,occivink/kakoune,Asenar/kakoune,rstacruz/kakoune,xificurC/kakoune,casimir/kakoune,jjthrash/kakoune,Asenar/kakoune,ekie/kakoune,Asenar/kakoune,danielma/kakoune,danr/kakoune,lenormf/kakoune,casimir/kakoune,Somasis/kakoune,alexherbo2/kakoune,elegios/kakoune,ekie/kakoune,mawww/kakoune,casimir/kakoune