lilypond 2.12.1 - strange result - missing line breaks

Hi,

after quite a long time of not using lilypond I got back to "engraving".
Attached example (modified SATB example, proven to work with other
pieces) produces somewhat surprising result
 - printout with second line extending to the right well past the edge
of the page...
How should I hint lilypond to break the lines and get good result?

Thanks in advance

Michal

test.ly
Description: Text Data

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