Otherwise the output would just read "Failed asserting that true is
false." or "Failed asserting that false is true.", which is not very
informative when there are several assertFalse/True in a row.
Signed-off-by: Daniel Calviño Sánchez <danxuliu@gmail.com>
Having both "FilesAppSharingContext" and "FilesSharingAppContext" was
confusing, so "FilesSharingAppContext" was renamed to a more descriptive
name.
Signed-off-by: Daniel Calviño Sánchez <danxuliu@gmail.com>