All pitchtools classes now initialize from empty input.

43 noninstantiable classes remain:

    abjad$ find-noninstantiable-classes

    abjadbooktools.AbjadBookProcessor
    abjadbooktools.CodeBlock
    agenttools.InspectionAgent
    agenttools.IterationAgent
    agenttools.MutationAgent
    agenttools.PersistenceAgent
    datastructuretools.CyclicMatrix
    datastructuretools.CyclicPayloadTree
    datastructuretools.Matrix
    datastructuretools.OrdinalConstant
    datastructuretools.PayloadTree
    datastructuretools.StatalServer
    datastructuretools.StatalServerCursor
    documentationtools.ClassCrawler
    documentationtools.ClassDocumenter
    documentationtools.FunctionCrawler
    documentationtools.FunctionDocumenter
    documentationtools.ModuleCrawler
    documentationtools.ReSTAutodocDirective
    documentationtools.ReSTAutosummaryItem
    documentationtools.ReSTHeading
    documentationtools.ReSTParagraph
    documentationtools.ReSTTOCItem
    documentationtools.ToolsPackageDocumenter
    indicatortools.Annotation
    indicatortools.IndicatorExpression
    indicatortools.LilyPondCommand
    indicatortools.LilyPondComment
    indicatortools.StemTremolo
    lilypondfiletools.LilyPondDimension
    lilypondparsertools.ContextSpeccedMusic
    lilypondparsertools.GuileProxy
    lilypondparsertools.LilyPondDuration
    lilypondparsertools.LilyPondEvent
    lilypondparsertools.LilyPondFraction
    lilypondparsertools.LilyPondLexicalDefinition
    lilypondparsertools.LilyPondSyntacticalDefinition
    lilypondparsertools.SequentialMusic
    lilypondparsertools.SyntaxNode
    markuptools.MarkupCommand
    markuptools.MusicGlyph
    metertools.Meter
    metertools.MetricAccentKernel

    Total classes:                 415
    Total noninstaniable classes:  43