STY: removed extra whitespace, thanks @adamrp
STY: removed extra variable (excited for flake8...), thanks @adamrp
DOC: mention of splitlib expectation, thanks @adamrp
DOC: mention of the samples parameter, thanks @adamrp
DOC: forgot to change random -> k...
STY: flake8
STY: removing unused variable
ENH: regex'd, thanks @adamrp