Run clippy pedantic fixes

[sylvestre]

Done with:
$ cargo +nightly clippy --tests --fix --allow-dirty -- -W clippy::pedantic

[codecov]

Codecov Report

Attention: Patch coverage is 48.27586% with 15 lines in your changes are missing coverage. Please review.

Project coverage is 58.59%. Comparing base (05d82ce) to head (b4fbbe5).
Report is 2 commits behind head on main.

Files	Patch %	Lines
tests/xargs_tests.rs	0.00%	0 Missing and 10 partials ⚠️
src/find/matchers/mod.rs	0.00%	2 Missing ⚠️
src/find/matchers/printf.rs	80.00%	1 Missing ⚠️
src/find/matchers/regex.rs	0.00%	1 Missing ⚠️
src/xargs/mod.rs	85.71%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #348      +/-   ##
==========================================
- Coverage   58.60%   58.59%   -0.02%     
==========================================
  Files          30       30              
  Lines        3713     3712       -1     
  Branches      841      840       -1     
==========================================
- Hits         2176     2175       -1     
  Misses       1223     1223              
  Partials      314      314              

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