This file is indexed.

/usr/share/libavogadro/shaders/per-pixel-lighting.vert is in avogadro-data 1.0.3-5.

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

The actual contents of the file can be viewed below.

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varying vec3 Normal;
varying vec3 Light;
varying vec3 HalfVector;

void main(void)
{
Normal = normalize(gl_NormalMatrix * gl_Normal);

Light = normalize(gl_LightSource[0].position.xyz);

HalfVector = normalize(gl_LightSource[0].halfVector.xyz);

gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;
}