### Please describe the problem.

git annex addurl will keep the »|« symbol in the filename generated from the video title when using quvi. This should be filtered out as the resulting file cannot copied to fat filesystems and may cause other problems.

### What steps will reproduce the problem?

    kasimon@pc:~/annex/YouTube/Kids$ git annex addurl --fast https://www.youtube.com/watch?v=OmXd6l54O8M
    addurl Reinhard_Mey_singt_Ernie_und_Bert__Über_den_Wolken__|_NDR.webm ok
    (Recording state in git...)

### What version of git-annex are you using? On what operating system?

    git-annex version: 5.20131221
    build flags: Assistant Webapp Pairing S3 WebDAV Inotify DBus XMPP Feeds Quvi TDFA
    key/value backends: SHA256E SHA1E SHA512E SHA224E SHA384E SHA256 SHA1 SHA512 SHA224 SHA384 WORM URL
    remote types: git gcrypt S3 bup directory rsync web webdav glacier hook
    local repository version: 3
    default repository version: 3
    supported repository versions: 3 5
    upgrade supported from repository versions: 0 1 2 4

    Ubuntu 13.10

### Please provide any additional information below.

> Ah, I see, pipe is not considered to be punctuation, but a math symbol.
> [[fixed|done]] --[[Joey]] 
