this test ensures that double encoded filenames are not a problem.
file names can already be encoded like a%20b and this was causing
problems and fixed with #3786
Signed-off-by: Mert Tumer <mert.tumer@collabora.com>
Change-Id: Ibaf0456f26c3a2e8d3c2863c2b925c7a5b9fc79c