This file is indexed.

/usr/lib/R/library/KernSmooth/INDEX is in r-cran-kernsmooth 2.23-15-1.

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

The actual contents of the file can be viewed below.

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bkde                    Compute a Binned Kernel Density Estimate
bkde2D                  Compute a 2D Binned Kernel Density Estimate
bkfe                    Compute a Binned Kernel Functional Estimate
dpih                    Select a Histogram Bin Width
dpik                    Select a Bandwidth for Kernel Density
                        Estimation
dpill                   Select a Bandwidth for Local Linear Regression
locpoly                 Estimate Functions Using Local Polynomials