[comment addon] When uncommenting a block comment, make sure its a single one
[comment addon] When uncommenting a block comment, make sure its a single one

Closes #4641

ejgallego/CodeMirror,SidPresse/CodeMirror,wingify/CodeMirror,jayaprabhakar/CodeMirror,jayaprabhakar/CodeMirror,grzegorzmazur/CodeMirror,pabloferz/CodeMirror,notepadqq/CodeMirror,hackmdio/CodeMirror,jkaplon/CodeMirror,ficristo/CodeMirror,dperetti/CodeMirror,grzegorzmazur/CodeMirror,thomasjm/CodeMirror,MarcelGerber/CodeMirror,thomasjm/CodeMirror,dperetti/CodeMirror,kerabromsmu/CodeMirror,MarcelGerber/CodeMirror,nightwing/CodeMirror,wingify/CodeMirror,codio/CodeMirror,jkaplon/CodeMirror,SidPresse/CodeMirror,SidPresse/CodeMirror,nightwing/CodeMirror,namin/CodeMirror,notepadqq/CodeMirror,ejgallego/CodeMirror,namin/CodeMirror,ficristo/CodeMirror,pabloferz/CodeMirror,ejgallego/CodeMirror,jkaplon/CodeMirror,namin/CodeMirror,schanzer/CodeMirror,mtaran-google/CodeMirror,pabloferz/CodeMirror,dperetti/CodeMirror,schanzer/CodeMirror,mtaran-google/CodeMirror,schanzer/CodeMirror,codio/CodeMirror,thomasjm/CodeMirror,wingify/CodeMirror,kerabromsmu/CodeMirror,ficristo/CodeMirror,nightwing/CodeMirror,mtaran-google/CodeMirror,kerabromsmu/CodeMirror,notepadqq/CodeMirror,hackmdio/CodeMirror,jayaprabhakar/CodeMirror,codio/CodeMirror,MarcelGerber/CodeMirror,hackmdio/CodeMirror,grzegorzmazur/CodeMirror