gh-112632: Add optional keyword-only argument `expand` to `pprint` (#136964)

Co-authored-by: stodoran <stefan.todoran@uipath.com>
Co-authored-by: StefanTodoran <stefan.alex4@gmail.com>
Co-authored-by: blurb-it[bot] <43283697+blurb-it[bot]@users.noreply.github.com>
Co-authored-by: Hugo van Kemenade <1324225+hugovk@users.noreply.github.com>