[yacas mode] Tokenize '#' as an operator
[yacas mode] Tokenize '#' as an operator

(see grzegorzmazur/yacas#231)

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