* Text: a word doesn't break after ?, !, } or + (URLs wrap as in PowerPoint)
Unicode line breaking allows a break after ?, !, } and + inside a word,
so a long URL broke after its '?' and after each '+' of a query and left
the rest of the line empty. Measured in PowerPoint 2016 for Windows with
latinLnBrk off (its default), none of them is a break: the word fills the
line and breaks where it no longer fits, as PowerPoint already does after
/ and \ (break_opportunities). The same synthetic slide now wraps line for
line as PowerPoint's PDF does, a Yandex search URL included.
* Text tests: the first line doesn't end at the separator
* Text tests: check the line is full, not that it avoids ending at a separator
* Keep the Unicode break after ?, !, / outside Latin words
The PowerPoint no-break rule only holds inside a word: before an ideograph
(日本!語) or punctuation the Unicode break stays, as CodeRabbit pointed out.
* Only letters and digits continue a word for the no-break rule
AL and AI also hold symbols such as & and ×, so a!&b kept no break after !.
is_word_char now also requires c.is_alphanumeric() (CodeRabbit).
* Test that Latin before CJK and a separator before a space still break
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Co-authored-by: Магда М.Г. <mail@mgmagda.ru>
Dylan M. Taylor