bug#9993: `vc-svn-checkin' needs "--non-interactive"

[Glenn Morris]

Version: 24.0.92

Stefan Monnier wrote:

>> or make vc-svn-command unconditionally add it
>
> That sounds right.

Done.

> We can add a comment in our code that --non-interactive is a workaround
> and that svn should do it automatically since we're using a pipe.

Gotta cater to the common use case of

  find . -name '*.pdf' | xargs svn update 

though. (http://svn.haxx.se/dev/archive-2009-04/0094.shtml)

Maybe newer svn DTRT though.