Replace BufWriteCmd by BufWrite event

[Konfekt]

By the way, CheckAttach uses BufWriteCmd which is not recommended; see :help Write-Cmd.
For example, often the buffer cannot be written and has to be quit unmodified. Why not replace it by a BufWrite event?

[chrisbra]

:h Write-Cmd is no valid help entry. I am not against changing it, but what problem are you actually facing?

[chrisbra]

I remember, when initially creating it, I had a problem that only worked with a custom BufWriteCmd, so that's why I used it for that and it worked fine until now.

[Konfekt]

It is :help Cmd-event. The problem is that sometimes the buffer cannot be written and has to be quit unmodified. Also, :help BufWriteCmd says that 'The buffer contents should not be changed.'

[chrisbra]

If the buffer cannot be written (or the BufWriteCmd) fails, you can always use :noa :w or even better disable the plugin :DisableCheckAttach command.