[fix] Invalid regular expression

[dgertych-monterail]

I'm getting Invalid regular expression error I think the / should be escaped.
Instead of |./? should be |.\/?

// current version
op = nickname.replace(/[\s!@#$%^&*()_+=\[{\]};:<>|./?\,\\'""-]/g, '_');
// should be
op = nickname.replace(/[\s!@#$%^&*()_+=\[{\]};:<>|.\/?\,\\'""-]/g, '_');