Regtest comparison issues for 2.13.31

[Phil Holmes]

Some of the regtest comparisons have failed.  I've reviewed these and would 
like comments on the following, please:

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display-lily-tests.ly

The following output is new to .31:

"Test 93 unequal: .
in = \time 2/4
out = \context Score \context Timing \applyContext #make-time-settings
Test 94 unequal: .
in = #(set-time-signature 5 8 '(3 2))
out = \context Score \context Timing \applyContext #make-time-settings"

It looks like a bug, but could a developer confirm?

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page-turn-page-breaking-auto-first-page.ly and page-breaking-page-count3.ly:

Both logfiles have "warning: couldn't fit music on page: overflow is" and 
then a figure.  The figure is new.  Is this bug-tracing output or a bug?

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page-breaking-min-systems-per-page2.ly:

Addition of: "warning: couldn't fit music on page" in logfile

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Phil Holmes
Bug Squad