[clojure mode] Treat commas as whitespace
[clojure mode] Treat commas as whitespace

Closes #5582

notepadqq/CodeMirror,mtaran-google/CodeMirror,notepadqq/CodeMirror,pabloferz/CodeMirror,codio/CodeMirror,notepadqq/CodeMirror,thomasjm/CodeMirror,thomasjm/CodeMirror,dperetti/CodeMirror,thomasjm/CodeMirror,hackmdio/CodeMirror,mtaran-google/CodeMirror,mtaran-google/CodeMirror,nightwing/CodeMirror,SidPresse/CodeMirror,nightwing/CodeMirror,wingify/CodeMirror,wingify/CodeMirror,wingify/CodeMirror,codio/CodeMirror,SidPresse/CodeMirror,hackmdio/CodeMirror,codio/CodeMirror,pabloferz/CodeMirror,nightwing/CodeMirror,hackmdio/CodeMirror,dperetti/CodeMirror,dperetti/CodeMirror,pabloferz/CodeMirror,SidPresse/CodeMirror