* fix the issue with max_depth and BestFirstTreeBuilder
* fix the test
* fix max_depth overshoot in BFS expansion
* fix forest tests
* remove the warning, add whats_new entry
* remove extra line
* add affected classes to changed classes
* add other affected estimators to the whats_new changed models
* shorten whats_new changed models entry
* Change default solver in LogisticRegression
* This is an API change, not a feature
* Decrease numerical precision in LogisticRegression doctest
* ENH add multi_class='auto' for LR, default from 0.22
* No warning when binary
* FIX enforce deterministic behaviour in BaseBagging
* DOC add entry in whats new for model changes
* add comments
* revert space
* revert space right place
* Typo
* FIX change estimators_samples_
* TST check size training set and hash during bootstrapping
* DOC/TST API entry in doc and style correction
* DOC move entry in the right section
* DOC add missing author and issue
* DOC add details in whats new entry
* FIX add hash from joblib in utils
* iter
* add FutureWarning for methods with defaults=3
* add explicit cv values to fix assertion errors
* add tests for catching the FutureWarning
* Write current deprecation version
* Add deprecation in docstring
* change default cv value to None
* change cv from 3 to 5 in the examples
* upgrade doctests
* update doctest in tutorial
* update doctest in cross-validation doc
* fix tests
* add entry to whats new
* address Gael comments
* address Gael comments 2
* fix wrong indentation
* update doc
* add docstring deprecation warning in CV subclasses
* address Andy's comments
* fix PR number
* fix flake8
* add filterwarnings in tests
* fix doctests
* cv=None mendatory in Ridge
* fix warning related errors
* skip some doctests warnings
* make travis happy
* change from deprecated to versionchanged
* fix doctests and remove skipping
* address comments
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Fixes#11128.
#### What does this implement/fix? Explain your changes.
Issues deprecation warning message for the default n_estimators parameter for the forest classifiers. Test added for the warning message when the default parameter is used.
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* flatten_transform parameter added to VotingClassifier
* Regression test added
* What's new section added
* flake8 fix
* Improve test and docstring
* Add what's new entry
* default value flatten_transofrm
* Add test for warning msg
* Fix bug in assert_warns_message
* Move warn msg into transform
* Add deprecation warning
* Merge warning
* Change warn msg
* Move what's content into Trees and ensembles
* Fixes minor bug
* update what's new
* update test
Rüdiger Busche
Hanmin Qin