Clarifications on the first(), next(), and previous() functions, based on comments from Detlef Lannert <lannert@lannert.rz.uni-duesseldorf.de>.
Clarifications on the first(), next(), and previous() functions, based
on comments from Detlef Lannert <lannert@lannert.rz.uni-duesseldorf.de>.

sk-/python2.7-type-annotator,sk-/python2.7-type-annotator,sk-/python2.7-type-annotator