Fix formatting demo's "[Un]Comment Selected" functionality (closes #826).
Fix formatting demo's "[Un]Comment Selected" functionality (closes #826).

filonb/CodeMirror2,leoshine/CodeMirror,filonb/CodeMirror2,femhub/CodeMirror2,filonb/CodeMirror2,femhub/CodeMirror2,femhub/CodeMirror2,leoshine/CodeMirror