remove outdated comment

fix also for FeatureUnion

[MRG+2] Limiting n_components by both n_features and n_samples instead of just n_features (Recreated PR) (scikit-learn#8742)

[MRG+1] Remove hard dependency on nose (scikit-learn#9670)

MAINT Stop vendoring sphinx-gallery (scikit-learn#9403)

CI upgrade travis to run on new numpy release (scikit-learn#9096)

CI Make it possible to run doctests in .rst files with pytest (scikit-learn#9697)

* doc/datasets/conftest.py to implement the equivalent of nose fixtures
* add conftest.py in root folder to ensure that sklearn local folder
  is used rather than the package in site-packages
* test doc with pytest in Travis
* move custom_data_home definition from nose fixture to .rst file

[MRG+1] avoid integer overflow by using floats for matthews_corrcoef (scikit-learn#9693)

* Fix bug#9622: avoid integer overflow by using floats for matthews_corrcoef

* matthews_corrcoef: cosmetic change requested by jnothman

* Add test_matthews_corrcoef_overflow for Bug#9622

* test_matthews_corrcoef_overflow: clean-up and make deterministic

* matthews_corrcoef: pass dtype=np.float64 to sum & trace instead of using astype

* test_matthews_corrcoef_overflow: add simple deterministic tests

TST Platform independent hash collision tests in FeatureHasher (scikit-learn#9710)

TST More informative error message in test_preserve_trustworthiness_approximately (scikit-learn#9738)

add some rudimentary tests for meta-estimators

fix extra whitespace in error message

add missing if_delegate_has_method in pipeline

don't test tuple pipeline for now

only copy list if not list already? doesn't seem to help?