file can not save in osx

[Crabime]

Here i changed a file under /opt folder and save it with control + s, but it's useless. maybe it's a protected file but if there are some hint about such unwritten condition will be nice. and cmd + s will store command line text. i made a screen snapshot but it seems github issue can not upload image..

[dschuyler]

Thanks for the bug report!

I've made a change so that the editor will realize the file didn't save. If there are unsaved changed, the editor will prompt the user to about whether they are ok loosing the changes. Does this change help?

Though that prompt may be a good place to suggest save-as; which is rather buried under ctrl+o, ctrl+s