This file is indexed.

/usr/lib/R/site-library/contfrac/INDEX is in r-cran-contfrac 1.1-10-1.

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

The actual contents of the file can be viewed below.

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CF                      Continued fraction convergent
as_cf                   Approximates a real number in continued
                        fraction form
contfrac-package        Continued fractions
convergents             Partial convergents of continued fractions