Orphaned and widowed lines in \markuplines

[Jiri Zurek (Prague)]

It happens to my scores that when using \markuplines for long texts (more
than a page), Lilypond leaves a first or a last line orphaned (single,
alone) on a page. This is normally unwanted in printed literature. Is there
a way how to instruct Lilypond not to leave orphaned or widowed single lines
on any page?
Since this happens only when long text is offered to Lilypond, I have to
attach an example of considerable length in words (a latin qoutation from
Augustinus). I am sorry for it.

%BEGIN LILYPOND EXAMPLE
\version "2.12.2"
\paper { 
 #(set-paper-size "a6")
}

\markuplines { \justified-lines { 
Quod ut breuiter ostendam, inde oportet incipiam, quod ipse aduertit et
posuit 
in libro memorato, quattuor esse quaedam, quae homines sine magistro, sine
ullo 
doctrinae adminiculo, sine industria uel arte uiuendi, quae uirtus dicitur
et 
procul dubio discitur, uelut naturaliter appetunt, aut uoluptatem, qua 
delectabiliter mouetur corporis sensus, aut quietem, qua fit ut nullam
molestiam
 corporis quisque patiatur, aut utramque, quam tamen uno nomine uoluptatis
Epicurus
  appellat, aut uniuersaliter prima naturae, in quibus et haec sunt et alia, 
  uel in corpore, ut membrorum integritas et salus atque incolumitas eius,
uel 
  in animo, ut sunt ea, quae uel parua uel magna in hominum reperiuntur
ingeniis. 
  Haec igitur quattuor, id est uoluptas, quies, utrumque, prima naturae, 
  ita sunt in nobis, ut uel uirtus, quam postea doctrina inserit, 
  propter haec appetenda sit, aut ista propter uirtutem, aut utraque propter 
  se ipsa; ac per hoc fiunt hinc duodecim sectae; per hanc enim rationem
singulae 
  triplicantur; quod cum in una demonstrauero, difficile non erit id in
ceteris 
  inuenire. Cum ergo uoluptas corporis animi uirtuti aut subditur aut 
  praefertur ... 
 } } 
%END LILYPOND EXAMPLE
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