This file is indexed.

/usr/share/pdb2pqr/extensions/README is in pdb2pqr 2.1.1+dfsg-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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Please see the programmer's guide (doc/programmerguide.html) for a discussion on how to add your own functionality to PDB2PQR.

Additionally, the "template" file is a template for interfacing with PDB2PQR.