This file is indexed.

/usr/include/images/square_root.pr is in xviewg 3.2p1.4-28.1.

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

The actual contents of the file can be viewed below.

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/* Format_version=1, Width=16, Height=16, Depth=1, Valid_bits_per_item=16
 */
	0x8888,0x8888,0x2222,0x2222,0x8888,0x8888,0x2222,0x2222,
	0x8888,0x8888,0x2222,0x2222,0x8888,0x8888,0x2222,0x2222