Fix string syntax highlighting
Fix string syntax highlighting

Multi-line strings were broken under desktop builds only. I really have no idea why. Something about the single-line string regexes being present were causing the multi-line string regexes to break. Fortunately there is no impact on correctness to remove the single-line regexes, possibly there is a (almost certainly negligible) performance impact.

brsimioni/rstudio,thklaus/rstudio,jzhu8803/rstudio,jzhu8803/rstudio,githubfun/rstudio,thklaus/rstudio,nvoron23/rstudio,more1/rstudio,tbarrongh/rstudio,jzhu8803/rstudio,brsimioni/rstudio,maligulzar/Rstudio-instrumented,jzhu8803/rstudio,JanMarvin/rstudio,jar1karp/rstudio,maligulzar/Rstudio-instrumented,maligulzar/Rstudio-instrumented,john-r-mcpherson/rstudio,brsimioni/rstudio,jar1karp/rstudio,vbelakov/rstudio,edrogers/rstudio,jzhu8803/rstudio,suribes/rstudio,sfloresm/rstudio,john-r-mcpherson/rstudio,jrnold/rstudio,piersharding/rstudio,pssguy/rstudio,jar1karp/rstudio,suribes/rstudio,jrnold/rstudio,more1/rstudio,john-r-mcpherson/rstudio,vbelakov/rstudio,jrnold/rstudio,pssguy/rstudio,sfloresm/rstudio,pssguy/rstudio,piersharding/rstudio,piersharding/rstudio,john-r-mcpherson/rstudio,tbarrongh/rstudio,brsimioni/rstudio,edrogers/rstudio,githubfun/rstudio,edrogers/rstudio,jzhu8803/rstudio,suribes/rstudio,vbelakov/rstudio,githubfun/rstudio,jar1karp/rstudio,pssguy/rstudio,piersharding/rstudio,suribes/rstudio,jrnold/rstudio,thklaus/rstudio,edrogers/rstudio,githubfun/rstudio,jrnold/rstudio,pssguy/rstudio,john-r-mcpherson/rstudio,tbarrongh/rstudio,jar1karp/rstudio,JanMarvin/rstudio,pssguy/rstudio,maligulzar/Rstudio-instrumented,more1/rstudio,nvoron23/rstudio,piersharding/rstudio,piersharding/rstudio,tbarrongh/rstudio,sfloresm/rstudio,maligulzar/Rstudio-instrumented,JanMarvin/rstudio,tbarrongh/rstudio,JanMarvin/rstudio,jrnold/rstudio,john-r-mcpherson/rstudio,brsimioni/rstudio,suribes/rstudio,vbelakov/rstudio,githubfun/rstudio,thklaus/rstudio,jrnold/rstudio,maligulzar/Rstudio-instrumented,suribes/rstudio,JanMarvin/rstudio,nvoron23/rstudio,sfloresm/rstudio,sfloresm/rstudio,tbarrongh/rstudio,more1/rstudio,vbelakov/rstudio,more1/rstudio,maligulzar/Rstudio-instrumented,nvoron23/rstudio,thklaus/rstudio,edrogers/rstudio,suribes/rstudio,jzhu8803/rstudio,more1/rstudio,nvoron23/rstudio,piersharding/rstudio,vbelakov/rstudio,edrogers/rstudio,jar1karp/rstudio,brsimioni/rstudio,more1/rstudio,jrnold/rstudio,jzhu8803/rstudio,JanMarvin/rstudio,sfloresm/rstudio,sfloresm/rstudio,thklaus/rstudio,JanMarvin/rstudio,jar1karp/rstudio,piersharding/rstudio,jar1karp/rstudio,nvoron23/rstudio,pssguy/rstudio,vbelakov/rstudio,pssguy/rstudio,sfloresm/rstudio,maligulzar/Rstudio-instrumented,more1/rstudio,thklaus/rstudio,maligulzar/Rstudio-instrumented,tbarrongh/rstudio,tbarrongh/rstudio,suribes/rstudio,thklaus/rstudio,john-r-mcpherson/rstudio,brsimioni/rstudio,vbelakov/rstudio,edrogers/rstudio,githubfun/rstudio,jar1karp/rstudio,githubfun/rstudio,jrnold/rstudio,edrogers/rstudio,brsimioni/rstudio,JanMarvin/rstudio,john-r-mcpherson/rstudio,nvoron23/rstudio,piersharding/rstudio,githubfun/rstudio,JanMarvin/rstudio