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<p class="MsoNormal"><span style="font-family:"Aptos",serif;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Aptos",serif;mso-fareast-language:EN-US">Speaking of line breaking... I have not done an analysis<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Aptos",serif;mso-fareast-language:EN-US">of the rules, but something is wrong when it comes to quote<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Aptos",serif;mso-fareast-language:EN-US">marks (QU) and line breaking, at least in some common<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Aptos",serif;mso-fareast-language:EN-US">applications. And it is wrong in a very annoying way,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Aptos",serif;mso-fareast-language:EN-US">and it happens very often (especially on 'smartphones'<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Aptos",serif;mso-fareast-language:EN-US">where the line length is relatively short).<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Aptos",serif;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Aptos",serif;mso-fareast-language:EN-US">1) It is common that an automatic line break is inserted<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Aptos",serif;mso-fareast-language:EN-US">between an open quote mark (which vary by language) and<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Aptos",serif;mso-fareast-language:EN-US">the quoted text (no space after the (open) quote mark).<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Aptos",serif;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Aptos",serif;mso-fareast-language:EN-US">2) It is not uncommon to see an automatic line break between<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Aptos",serif;mso-fareast-language:EN-US">the quoted text and an end quote mark (varies by language).<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Aptos",serif;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Aptos",serif;mso-fareast-language:EN-US">3) This never happend in the "naive old days" when (almost)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Aptos",serif;mso-fareast-language:EN-US">only spaces guided where automatic line breaks were inserted.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Aptos",serif;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Aptos",serif;mso-fareast-language:EN-US">I know that for French it is common to have a space after<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Aptos",serif;mso-fareast-language:EN-US">a begin quote mark, and before an end quote mark. Maybe those<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Aptos",serif;mso-fareast-language:EN-US">should be NARROW NO_BREAK SPACEs (U+202F)... And yes, in some<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Aptos",serif;mso-fareast-language:EN-US">scripts one does not use space inside phrases/sentences at all.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Aptos",serif;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Aptos",serif;mso-fareast-language:EN-US">It is still quite annoying to see inappropriate automatic<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Aptos",serif;mso-fareast-language:EN-US">line breaks between a (begin) quote mark and a letter/symbol<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Aptos",serif;mso-fareast-language:EN-US">or between a letter/symbol and an (end) quote mark.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Aptos",serif;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Aptos",serif;mso-fareast-language:EN-US">I can't at this time point to a specific rule to change/fix...<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Aptos",serif;mso-fareast-language:EN-US">(or if it is just some implementations that are at fault).<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Aptos",serif;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Aptos",serif;mso-fareast-language:EN-US">Kent Karlsson<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Aptos",serif;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Aptos",serif;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> Unicode <unicode-bounces@corp.unicode.org>
<b>On Behalf Of </b>Henry via Unicode<br>
<b>Sent:</b> Wednesday, September 3, 2025 6:42 PM<br>
<b>To:</b> unicode@corp.unicode.org<br>
<b>Subject:</b> Possibly incorrect line break tests?<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">In LineBreakTest.txt, there are test cases that indicate there should *not* be a break after U+0308, however, the LB rule cited does not appear to apply and it would appear that there *should* be a break. For example:<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">× 000A ÷ 0308 × 23E9 ÷ # × [0.3] <LINE FEED (LF)> (LF_NotEastAsian) ÷ [5.03] COMBINING DIAERESIS (CM1_NotEastAsian_CM) × [28.0] BLACK RIGHT-POINTING DOUBLE TRIANGLE (AL) ÷ [0.3]<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">LB28 states "Do not break between alphabetics (“at”)" with the following break rule:<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">(AL | HL) × (AL | HL)<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">However, in the aforementioned test case, neither U+000A nor U+0308 has break class AL or HL (they have break class LF and CM). Yet rule 28.0 is cited as the reason for not breaking between U+0308 and U+23E9. It would appear that there
_should_ be a break here.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Likewise, for the test:<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">× 200B ÷ 0308 × 0024 ÷ # × [0.3] ZERO WIDTH SPACE (ZW_NotEastAsian) ÷ [8.0] COMBINING DIAERESIS (CM1_NotEastAsian_CM) × [24.03] DOLLAR SIGN (PR_NotEastAsian) ÷ [0.3]<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">LB24 states "Do not break between alphabetics (“at”)" with the following break rule:<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">(PR | PO) × (AL | HL)<o:p></o:p></p>
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<p class="MsoNormal">(AL | HL) × (PR | PO)<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">However, neither U+200B nor U+0308 has break class PR, PO, AL, or HL (they have break class ZW and CM). Yet rule 24.03 is cited as the reason for not breaking between U+0308 and U+0024. It would appear that there _should_ be a break here.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">In total, I have collected ~80 test cases from LineBreakTest.txt that exhibit this same pattern.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">I'm wondering if these test cases were meant to have a hyphen character because then they'd respect rule LB20a which states "Do not break after a word-initial hyphen". This rule has the definition:<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">( sot | BK | CR | LF | NL | SP | ZW | CB | GL ) ( HY | [\u2010] ) × AL<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">So, for example, test case:<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">× 000A ÷ 0308 × 23E9 ÷ # LF ÷ CM × AL (incorrect?)<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">would become:<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">× 000A ÷ 0308 ÷ 002D × 23E9 ÷ # LF ÷ CM ÷ HY × AL (correct)<o:p></o:p></p>
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