Fixing Gnome's screenshot tool

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Sometimes, Gnome's screenshot tool, gnome-screenshot, fails to copy any image data to the clipboard. The following commands can be invoked instead as a workaround.

Screenshot (full screen):

gnome-screenshot -cf /tmp/test && cat /tmp/test

Screenshot (area selection):

gnome-screenshot -acf /tmp/test && cat /tmp/test

(The only difference between the two is the lack of -a flag in the first command.)