preferred content: include statement does not allow spaces in filenames

Please describe the problem.

Filenames for the include statement for preferred content can not contain spaces.

What steps will reproduce the problem?

Create an annex repo
Run git annex vicfg
Enter expression include='pictures/dir with spaces'
git annex complains: # ** Parse error in next line: Parse failure: near "with" Parse failure: near "spaces'"

(The ' is interpreted as part of the filepath.)

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

I am using the current binaries from Debian stable amd64.

git-annex version: 5.20140320~bpo70+1
build flags: Assistant Webapp Pairing S3 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 tahoe glacier hook external
local repository version: 5
supported repository version: 5
upgrade supported from repository versions: 0 1 2 4

Please provide any additional information below.

The only workaround I found is to use a glob for the filepath which only works for the first space: include='pictures/dir*'.

fixed by documenting the <span class="createlink"><a href="/ikiwiki.cgi?do=create&from=bugs%2Fpreferred_content__58___include_statement_does_not_allow_spaces_in_filenames&page=__58__space__58__" rel="nofollow">?</a>:space:</span> workaround. --Joey