New in version 1.1.1.
Iterate expr and change notes, rests and chords into skips.
Pass expr an an Abjad component or a Python list of Abjad components.
Return None.
abjad> staff = Staff(RigidMeasure((2, 8), construct.scale(2)) * 2)
abjad> leaftools.leaves_to_skips(staff[0])
abjad> print staff.format
\new Staff {
\time 2/8
s8
s8
\time 2/8
c'8
d'8
}