Fix RFE n_features minimum value #3812
Fix RFE n_features minimum value #3812 and make it simpler.
If step is explicitly zero or negative, raise a ValueError exception.
gen_rst to use css tooltip instruction
remove gallery css chunk from theme css
Remove JS from examples gallery
Examples gallery css file
fix gen_rst file extension
add crossvalidation
DOC add missing import to plot_underfitting_overfitting.py, fix plot height.
Merge branch 'pr/3914'
Update what's new
FIX copy paste mistake
Merge pull request #3925 from Titan-C/cssbox

Nilearn css template for the examples gallery
Merge pull request #3869 from borjaayerdi/rfe_n_features_to_remove

Fix RFE n_features minimum value #3812
DOC more expansive description of well-established algorithms
DOC typo
ENH LinearSVR using liblinear code

Fixes gh-3877.
what_new entry for KD and BallTree doc fixes
Fixed error message typo

"protect you main loop" to "protect your main loop"