Finish statal parts of rhythm-makers

[trevorbaca]

Write statal doctests:

• AccelerandoRhythmMaker.beam_specifier
• AccelerandoRhythmMaker.division_masks
• AccelerandoRhythmMaker.interpolation_specifiers
• AccelerandoRhythmMaker.logical_tie_masks
• AccelerandoRhythmMaker.previous_state
• AccelerandoRhythmMaker.state
• AccelerandoRhythmMaker.tie_specifier
• NoteRhythmMaker.beam_specifier
• NoteRhythmMaker.burnish_specifier
• NoteRhythmMaker.division_masks
• NoteRhythmMaker.logical_tie_masks
• NoteRhythmMaker.previous_state
• NoteRhythmMaker.state
• NoteRhythmMaker.tie_specifier
• TaleaRhythmMaker.beam_specifier
• TaleaRhythmMaker.extra_counts_per_division
• TaleaRhythmMaker.previous_state
• TaleaRhythmMaker.tie_specifier

Generalize statal selectors:

This output (with pattern object) is statal. This is correct. Selector selects logical ties 6 and 7:

staff = abjad.Staff("c'8 d' ~ { d' e' r f'~ } f' r")
logical_ties = abjad.select(staff).logical_ties()
previous = len(logical_ties)
pattern = abjad.index([4, 5, 6, 7])
result = abjad.select(staff, previous=previous)
result.logical_ties()[pattern]
Selection([LogicalTie([Note("c'8")]), LogicalTie([Note("d'8"), Note("d'8")])])

This output (with slice) is not statal. This is incorrect. Selector selects logical ties 4 and 5:

staff = abjad.Staff("c'8 d' ~ { d' e' r f'~ } f' r")
logical_ties = abjad.select(staff).logical_ties()
previous = len(logical_ties)
result = abjad.select(staff, previous=previous)
result = result.logical_ties()[4:8]
Selection([LogicalTie([Note("f'8"), Note("f'8")]), LogicalTie([Rest('r8')])], previous=6)

• Allow for statal selectors with integer and slice indexing