This file is indexed.

/usr/lib/R/site-library/MatchIt/INDEX is in r-cran-matchit 3.0.1-1.

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

The actual contents of the file can be viewed below.

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get_matches             Get matches from matchit object
help.matchit            HTML Help for Matchit Commands and Models
is.matchit              Checks matchit Class
lalonde                 Data from National Supported Work Demonstration
                        and PSID, as analyzed by Dehejia and Wahba
                        (1999).
match.data              Output Matched Data Sets
matchit                 MatchIt: Matching Software for Causal Inference
user.prompt             Pause in demo files