Input command should not be auto-corrected

[NicolasBuquet]

A piece of code in Element auto-correct user input in Riot/modules/Room/Views/InputToolbar/RoomInputToolbarView.swift:sendCurrentMessage()

        // Triggers auto-correct if needed.
        if self.isFirstResponder {
            let temp = UITextField(frame: .zero)
            temp.isHidden = true
            self.addSubview(temp)
            temp.becomeFirstResponder()
            self.becomeFirstResponder()
            temp.removeFromSuperview()
        }

Although it is usually ok to help user correcting its input, it should not be done when input is a command.

For instance, it makes command /discardsession to be rewritten as /discard session and makes the command not identified.

I propose that command (string beginning with a '/') should not be auto-corrected.

It is a problem on Element side (element-hq/element-ios#7424)