This file is indexed.

/usr/share/meshlab/shaders/polkadot3d.gdp is in meshlab 1.3.2+dfsg1-4.

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

The actual contents of the file can be viewed below.

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<?xml version="1.0" encoding="utf-8" standalone="yes"?>
<GLSLang>
  <Metadata>
    <Author Author="" />
    <Email Email="" />
    <Company Company="" />
    <Shader Shader="" />
    <ShaderDescription ShaderDescription="" />
    <License License="" />
    <Version Version="" />
  </Metadata>
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    <Filenames>
      <Filename0 VertexProgram="polkadot3d.vert" />
    </Filenames>
  </VPCount>
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    <Filenames>
      <Filename0 FragmentProgram="polkadot3d.frag" />
    </Filenames>
  </FPCount>
  <TexturesPlugins NumberOfPlugins="0" />
  <TexturedUsed NumberUsedTU="0" />
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      <Values Value0="0.36" />
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    </Uniform5>
  </UniformVariables>
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  <MotionData Speed="0.05" Distance="4" Rotation="False" />
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</GLSLang>