On Date: Fri, 7 Feb 2020 08:03:44 -0800, Paul E. McKenney wrote:
> On Sat, Feb 08, 2020 at 12:26:49AM +0900, Akira Yokosawa wrote:
>> On Fri, 7 Feb 2020 04:44:58 -0800, Paul E. McKenney wrote:
>>> On Fri, Feb 07, 2020 at 07:40:55AM +0900, Akira Yokosawa wrote:
>>>> >From 6ad4c736867394d765a4b50aba907ef0dd8420ba Mon Sep 17 00:00:00 2001
>>>> From: Akira Yokosawa <akiyks@xxxxxxxxx>
>>>> Date: Thu, 6 Feb 2020 22:16:28 +0900
>>>> Subject: [PATCH] Permit occasional orphans
>>>>
>>>> Recent update of upstream LaTeX caused excessively wide spaces between
>>>> paragraphs in 2c layout similar to the issue mentioned in the change
>>>> log of commit 4c6ee39761a0 ("Remove required version of 'epigraph'")
>>>> at the beginning of Chapter 6.
>>>>
>>>> The root cause of the unstable behavior is the constraints imposed
>>>> by the unfortunate combination of a fairly tall unbreakable block
>>>> (consisting of a section heading, a section epigraph, a paragraph
>>>> of only 3 lines), a footnote, and a floating figure.
>>>>
>>>> Note that the "nowidow" package requires at least 4 lines for a
>>>> paragraph to be broken.
>>>>
>>>> An orphan line (first line of a paragraph at the bottom of a page/column)
>>>> looks less ugly than a widow line (final line of a paragraph at the top
>>>> of a page/column) does.
>>>>
>>>> As a band-aid patch, this commit permits an orphan at the problematic
>>>> paragraph by the \noclub command provided by the "nowidow" package
>>>> and avoids such ugly wide spaces.
>>>> Another approach would be to add some words to the paragraph and
>>>> make it 4 lines or more.
>>>>
>>>> By this change, TeX Live 2015/Debian (on Ubuntu Xenial) with the
>>>> up-to-date "epigraph" can also produce the (mostly) same output.
>>>>
>>>> Do similar tweaks to avoid wide vertical spaces in a couple of other
>>>> chapters.
>>>>
>>>> Signed-off-by: Akira Yokosawa <akiyks@xxxxxxxxx>
>>>
>>> Queued and pushed, thank you!
>>>
>>> I also expanded the paragraph preceeding your \noclub, please check to
>>> make sure that this really fixes the problem in the other environments.
>>
>> Yes, now the beginning of Section 6.1 fits in the left column of
>> the page on both the up-to-date TeX Live 2019 and TeX Live 2015/Debian
>> with the up-to-date "epigraph".
>
> Very good, thank you!
>
>>> This also caused me to wonder about the two-page "think about it" gap
>>> following the introduction of Dining Philosophers. Not a problem in> electronic editions, but it looks like a print edition would have a pair
>>> of pages with only "(Intentional blank page)" in the upper left. Might
>>> not be worth worrying about, though.
>>
>> Ah, blank pages on odd and even pages do look strange.
>> IIUC, a pair of odd and even pages are printed on both side of a
>> paper.
>
> Yes, for example, on one of the printed copies of the first edition,
> pages 217 and 218 are on opposite sides of the same sheet of paper.
Maybe commit 67aae72180cb ("SMPdesign: Restore effect of \cleardoublepage")
has something to do with this issue.
>
>> If the question is on an even page, to prevent the answer from being spotted
>> early, it should not be on the next (odd) page but on the next even page.
>> If the question is on an odd page, the answer may be on the other side
>> (even page) without any blank page for print edition.
>>
>> Is my understanding of the problem correct?
>
> Sounds correct to me!
>
>> So we need to make the added blank page(s) conditional to Edition type,
>> don't we?
>
> Quite possibly, but on the other hand people do occasionally print random
> versions of the book. So it would be better to assume that any random
> git commit might be printed.
So, rather than
>> If the question is on an odd page, the answer may be on the other side
>> (even page) without any blank page for print edition.
, the rule would be:
>> If the question is on an odd page, the answer should be on a even page
>> after 2 blank pages in between.
Does this sound good?
Thanks, Akira
>
>> Hopefully I might be able to come up some way to do this soon enough.
>
> Sounds very good! Not critically important or urgent, but it would
> be nice to have.
>
> Thanx, Paul
>
>> Thanks, Akira
>>
>>>
>>> Thanx, Paul
>>>
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