Buffer: optimize do_insert to minimize changes in m_lines vector
Buffer: optimize do_insert to minimize changes in m_lines vector

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