Please describe the problem:
File-roller as of version 2.27.2 and newer won't archive files with spaces (" ") in them. It seems as the underlaying layer/command doesn't accept the format in which file-roller passes the file name.

First saw this problem in the Ubuntu version 2.27.3-0ubuntu1 of file-roller. Went on to try building different versions of file-roller from original source packages, using default ./configure. File-roller 2.27.1 and earlier handled the spacy-filenames just fine, while the versions 2.27.2 and 2.27.3 ran into said problem. 

Steps to reproduce:
1. Create a file, containg a space (" ") in its name. Let us say "hello world" as an example.
2. Start file-roller
3. Create an archive of type tar, ar or jar
4. Try adding the file from step 1


Actual results:
I recieve an error such as this.

tar: hello%20world: Cannot stat: No such file or directory
tar: Exiting with failure status due to previous errors

The file is not added to the archive

Expected results:
The file to be added to the archive, without any error message.

Does this happen every time?
Yes

Other information:
Originally reported as a Ubuntu bug in Launchpad, https://bugs.launchpad.net/bugs/406762