Unoconv fails on files with spaces in the name.

Pre requisites

This should be tested on Windows and Linux.

1. Create a course and enrol a couple of users as students
2. Create an assignment in the course.
3. Log in as each student user and submit a .docx file to the assignment.
   • The first student should submit a file with no spaces in the file name ("testfile.docx")
   • The second student should submit a file with spaces in the file name ("test file.docx")
4. Log in as a teacher account and click to grade the assignments.
   • The first student's annotation window should show the file as expected.
   • The second student's annotation window should show the file as expected.