…cs/donigian-update-contribution-guidelines

* 'master' of github.com:scikit-learn/scikit-learn: (23 commits)
  fixes scikit-learn#10031: fix attribute name and shape in documentation (scikit-learn#10033)
  [MRG+1] add changelog entry for fixed and merged PR scikit-learn#10005 issue scikit-learn#9633 (scikit-learn#10025)
  [MRG] Fix LogisticRegression see also should include LogisticRegressionCV(scikit-learn#9995) (scikit-learn#10022)
  [MRG + 1] Labels of clustering should start at 0 or -1 if noise (scikit-learn#10015)
  MAINT Remove redundancy in scikit-learn#9552 (scikit-learn#9573)
  [MRG+1] correct comparison in GaussianNB for 'priors' (scikit-learn#10005)
  [MRG + 1] ENH add check_inverse in FunctionTransformer (scikit-learn#9399)
  [MRG] FIX bug in nested set_params usage (scikit-learn#9999)
  [MRG+1] Fix LOF and Isolation benchmarks (scikit-learn#9798)
  [MRG + 1] Fix negative inputs checking in mean_squared_log_error (scikit-learn#9968)
  DOC Fix typo (scikit-learn#9996)
  DOC Fix typo: x axis -> y axis (scikit-learn#9985)
  improve example plot_forest_iris.py (scikit-learn#9989)
  [MRG+1] Deprecate pooling_func unused parameter in AgglomerativeClustering (scikit-learn#9875)
  DOC update news
  DOC Fix three typos in manifold documentation (scikit-learn#9990)
  DOC add missing dot in docstring
  DOC Add what's new for 0.19.1 (scikit-learn#9983)
  Improve readability of outlier detection example. (scikit-learn#9973)
  DOC: Fixed typo (scikit-learn#9977)
  ...