GeezerVison

Reference Issues/PRs

Closes #28793
Supersedes #30307

What does this implement/fix? Explain your changes.

• Added a combined copy / copy_x / copy_X entry to the glossary
  (doc/glossary.rst), under Parameters.
• Linked the term inline from the docstrings that use those parameters
  (22 files), using :term:copy / :term:copy_x / :term:copy_X,
  following StefanieSenger's feedback on DOC Document copy parameter and add link to the glossary entry #30307.
• Wording follows lesteve's guidance on Unexpected behavior of sklearn.feature_selection.mutual_info_regression if copy=False #28793: copy=False tries to
  avoid copying to save memory, but it does not guarantee in-place
  modification, so callers should not rely on the input either remaining
  intact or being modified in a specific way.
• Dropped Birch from the original PR: its copy parameter no longer
  exists on main. Also changed "will be overwritten" to "may be
  overwritten" in _mutual_info.py, since y is copied there.
• Documentation only, no behaviour change, so no changelog entry.

Introduce yourself

• I'm Usman Wajid 7th-semester CS student at FAST-NUCES, Lahore.
• First contribution to scikit-learn; I use it in my ML projects
  (house-price, churn, sentiment) and am preparing for GSoC 2027.

AI usage disclosure

I used AI assistance for:

• Research and understanding

Any other comments?

• The original work was @lamdang2k's in DOC Document copy parameter and add link to the glossary entry #30307. This PR rebases it onto
  current main and applies the review feedback from that PR.
• Checks run: ruff check and ruff format clean on all 22 modified files;
  test_docstring_parameters_consistency (4 passed),
  test_docstring_parameters (210 passed), test_docstrings filtered to the
  modified classes/functions (461 passed). Pyrefly was run directly with
  0 errors, because the pre-commit pyrefly hook could not download from
  PyPI on my machine (transient SSL/DNS error).