[libgudev] (8 commits) ...gudev: Document the _uncached variant addition and fixed versions

[Bastien Nocera <hadess src gnome org>]

Summary of changes:

  71b2fda... gudev: Fix newline stripping by always reading using udev (*)
  ae38f38... tests: Verify that trailing newlines are removed by udev (*)
  eac55b9... tests: Move testbed creation into fixture (*)
  5a09eb0... tests: Add helper function to setup single device environme (*)
  0b89905... tests: Add test for g_udev_device_get_sysfs_attr_keys (*)
  8ef0801... tests: Add helper to write sysfs attribute (*)
  881b84b... tests: Add test for strv getting (*)
  51869ed... gudev: Document the _uncached variant addition and fixed ve (*)

(*) This commit already existed in another branch; no separate mail sent