/usr/share/kivy-examples/includes/button.kv is in python-kivy-examples 1.9.0-3build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 | #:kivy 1.8.0
<SpecialButton>:
canvas:
Color:
rgba: 1.0, 0.0, 0.0, 1.0
Rectangle:
pos: self.pos
size: (self.size[0]/4, self.size[1]/4)
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