completing deprecation

…3505)

* clarify upstream synchronization

* apply Nicolas's comment

* fix typo

* don't mention the rebase

* move the notes

* fix branch name

…kages (#13527)

* Fix for sphinx-gallery 0.3.1.

Figure numbering have been changed to ignore matplotlib figure number.

* Use circleci/3.6 image.

This docker image uses Debian stretch and fixes the problems seen with apt-get update with Debian jessie.

* Install additional fonts.

Seems to be needed to convert doc/images/iris.svg.

* Another missed example using figure number 0.

[doc build]

* remove fit_params from BaseSearchCV.__init__

* fixed randomness of test_imputation_pipeline_grid_search?

* removed KFolds

* ENH iForest - expose warm_start (#13451)

* Incorporates comments from PR #13496

* versionadded=0.21

* adition in whatsnew

* test using iris dataset

* Update sklearn/ensemble/tests/test_iforest.py

smaller dataset for testing

Co-Authored-By: petibear <40757147+petibear@users.noreply.github.com>

* Trigger CI

* Corrected the PR reference

* doc entry on warm_start + renamed the test

* Corrections in the doc example

* comments made inline in the doc example

…13530)

…ing documentation (#13535)

* first commit

* remove "if necessary"