This file is indexed.

/usr/share/gwyddion/gradients/Red is in gwyddion-common 2.50-2.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

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Gwyddion resource GwyGradient
0 0 0 0 1
0.5 1 0 0 1
1 1 1 1 1