[javascript mode] Reduce start-of-line restriction to HTML close comment tokens
[javascript mode] Reduce start-of-line restriction to HTML close comment tokens

Issue #6305

hackmdio/CodeMirror,hackmdio/CodeMirror,wingify/CodeMirror,nightwing/CodeMirror,nightwing/CodeMirror,dperetti/CodeMirror,wingify/CodeMirror,pabloferz/CodeMirror,dperetti/CodeMirror,dperetti/CodeMirror,hackmdio/CodeMirror,pabloferz/CodeMirror,pabloferz/CodeMirror,nightwing/CodeMirror,wingify/CodeMirror