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FA-80031 / Typography line breaking / Open access

CJK kinsoku line breaking: small kana strictness · case 01

Small kana and long vowel marks begin lines.

Verified by executionVariant 1 · 8 checks per implementationDownload source bundle ↓JSON ↗

ROOT CAUSE

The prohibited-start set omits small kana and the long vowel mark.

VERIFIED REPAIR

Use the strict set that includes small kana and ー.

Unsuccessful approach: Adding small kana but not ー still lets the long vowel mark start lines.

Case contract

Input [text of full-width characters, line length L]. Lines take L characters. If the next character is a hanging comma/period (、。，．) and is not itself followed by a line-start-prohibited character, it hangs on the line (burasage). Otherwise move characters to the next line while the next line would start with a prohibited character (、。，．）」』！？ー and small kana), then while the line would end with an opening bracket; a line keeps at least one character. Return the lines.

Why this case matters

Line breaking decides where paragraphs wrap on screen and in print; a wrong decision point shifts every following line.

1 / The failure

Exit 1
"""Failure Map reference implementation. Python standard library only."""
import json

N = 1
observations = []
def solve(x):
    text, L = x
    NO_START = '、。，．）」』！？'
    NO_END = '（「『'
    HANG = '、。，．'
    lines = []
    pos = 0
    n = len(text)
    while pos < n:
        end = pos + L
        if end >= n:
            lines.append(text[pos:])
            break
        if text[end] in HANG and (end + 1 >= n or text[end + 1] not in NO_START):
            end += 1
        else:
            while end > pos + 1 and text[end] in NO_START:
                end -= 1
            while end > pos + 1 and text[end - 1] in NO_END:
                end -= 1
        lines.append(text[pos:end])
        pos = end
    return lines
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
fixtures = [[('small kana prohibited at line start', ['日本語かっこいい', 4], ['日本語', 'かっこい', 'い']), ('regression: small kana strictness', ['こあ）ー、あ）っこ、「（あ「けけっ。えかきー文', 8], ['こあ）ー、あ）っ', 'こ、「（あ「け', 'けっ。えかきー文']), ('regression: small kana strictness', ['（）字「文版い字ー「版ーっ「。』組字組けあか「', 8], ['（）字「文版い', '字ー「版ーっ', '「。』組字組けあ', 'か「']), ('regression: small kana strictness', ['語かおい。字ー」きくおあけ『', 6], ['語かおい。', '字ー」きくお', 'あけ『']), ('period hangs past the measure', ['日本語文。字組版', 4], ['日本語文。', '字組版']), ('period followed by bracket cannot hang', ['日本語文。」字組', 4], ['日本語', '文。」字', '組']), ('control layout', ['組『「（くお字き「本け、くえ日「。。」（お', 8], ['組『「（くお字き', '「本け、くえ日', '「。。」（お']), ('control layout', ['、』ゃあこけ字文お」かーかー。けきー', 8], ['、』ゃあこけ字文', 'お」かーかー。け', 'きー'])], [('regression: small kana strictness', ['きあ。えーくーゃい', 4], ['きあ。', 'えー', 'くーゃい']), ('regression: small kana strictness', ['本『く、ゃ本かっ', 7], ['本『く、ゃ本', 'かっ']), ('regression: small kana strictness', ['語字、え『えくゃえー』』ーこ組「日『。（', 4], ['語字、え', '『えくゃ', 'え', 'ー』』ー', 'こ組「日', '『。（']), ('regression: small kana strictness', ['けこ。語く「組き語け）おい組文うー', 8], ['けこ。語く「組き', '語け）おい組文', 'うー']), ('closing bracket pushes out', ['日本語文」字組版', 4], ['日本語', '文」字組', '版']), ('period followed by bracket cannot hang', ['日本語文。」字組', 4], ['日本語', '文。」字', '組']), ('control layout', ['、け）「文本、語文『こ（字けこ', 5], ['、け）「文', '本、語文', '『こ（字け', 'こ']), ('control layout', ['け（え）けうけ語「組『けーく字え字', 5], ['け（え）け', 'うけ語「組', '『けーく字', 'え字'])], [('regression: small kana strictness', ['日組こ、『っ、ー日ーあ』っ「、き「字っ', 6], ['日組こ、', '『っ、ー日ー', 'あ』っ「、き', '「字っ']), ('regression: small kana strictness', ['えい語く』うっき版うく『）ゃけか', 3], ['えい語', 'く』', 'うっき', '版うく', '『）ゃ', 'けか']), ('regression: small kana strictness', ['（）字「文版い字ー「版ーっ「。』組字組けあか「', 8], ['（）字「文版い', '字ー「版ーっ', '「。』組字組けあ', 'か「']), ('regression: small kana strictness', ['版っ』い「）ー）。）', 3], ['版っ』', 'い', '「', '）', 'ー', '）。）']), ('opening bracket at line end', ['日本語「文字」組版', 4], ['日本語', '「文字」', '組版']), ('closing bracket pushes out', ['日本語文」字組版', 4], ['日本語', '文」字組', '版']), ('control layout', ['っ日本語字こ（く」『、こう文かいえ。。ー', 8], ['っ日本語字こ', '（く」『、こう文', 'かいえ。。ー']), ('control layout', ['語う版っこう『」', 8], ['語う版っこう『」'])], [('regression: small kana strictness', ['）文っ語（く」（。いお、『』ー版版', 7], ['）文っ語（く」', '（。いお、', '『』ー版版']), ('regression: small kana strictness', ['きあ。えーくーゃい', 4], ['きあ。', 'えー', 'くーゃい']), ('regression: small kana strictness', ['いあ『本く）く。ー', 3], ['いあ', '『本', 'く）', 'く。ー']), ('regression: small kana strictness', ['語字、え『えくゃえー』』ーこ組「日『。（', 4], ['語字、え', '『えくゃ', 'え', 'ー』』ー', 'こ組「日', '『。（']), ('period followed by bracket cannot hang', ['日本語文。」字組', 4], ['日本語', '文。」字', '組']), ('opening bracket at line end', ['日本語「文字」組版', 4], ['日本語', '「文字」', '組版']), ('control layout', ['）、えゃ語うかえ「本あこ（字）ーえ字あか版』', 6], ['）、えゃ語う', 'かえ「本あこ', '（字）ーえ字', 'あか版』']), ('control layout', ['あ。」あ文（け版。日）語え』', 6], ['あ。」あ文', '（け版。日）', '語え』'])], [('regression: small kana strictness', ['版ー『版かゃき組本字』', 5], ['版ー『版', 'かゃき組本', '字』']), ('regression: small kana strictness', ['（日おあ」『こか、語。）本文っ、文えあゃ。', 5], ['（日おあ」', '『こか、', '語。）本', '文っ、文え', 'あゃ。']), ('regression: small kana strictness', ['文。いいおっけー本。う「ういおくかえ', 7], ['文。いいおっ', 'けー本。う「う', 'いおくかえ']), ('regression: small kana strictness', ['きっ文こ」あ。けけききき「日ー文ーか、い。', 7], ['きっ文こ」あ。', 'けけききき', '「日ー文ーか、', 'い。']), ('opening bracket at line end', ['日本語「文字」組版', 4], ['日本語', '「文字」', '組版']), ('period hangs past the measure', ['日本語文。字組版', 4], ['日本語文。', '字組版']), ('control layout', ['版っ日けおく、）」版（「', 6], ['版っ日けお', 'く、）」版', '（「']), ('control layout', ['こあく。（く版「うえけ。。。え', 8], ['こあく。（く版', '「うえけ。。。え'])]]
for label, args, expected in fixtures[N - 1]:
    check(label, solve(args), expected)
print(json.dumps({"observations": observations, "passed": all(x["passed"] for x in observations)}, ensure_ascii=False))
raise SystemExit(0 if all(x["passed"] for x in observations) else 1)
Boundary fixtureActualExpectedOutcome
small kana prohibited at line start['日本語か', 'っこいい']['日本語', 'かっこい', 'い']Failed
regression: small kana strictness['こあ）ー、あ）っ', 'こ、「（あ「けけ', 'っ。えかきー文']['こあ）ー、あ）っ', 'こ、「（あ「け', 'けっ。えかきー文']Failed
regression: small kana strictness['（）字「文版い字', 'ー「版ーっ「。』', '組字組けあか「']['（）字「文版い', '字ー「版ーっ', '「。』組字組けあ', 'か「']Failed
regression: small kana strictness['語かおい。字', 'ー」きくおあ', 'け『']['語かおい。', '字ー」きくお', 'あけ『']Failed
period hangs past the measure['日本語文。', '字組版']['日本語文。', '字組版']Passed
period followed by bracket cannot hang['日本語', '文。」字', '組']['日本語', '文。」字', '組']Passed
control layout['組『「（くお字き', '「本け、くえ日', '「。。」（お']['組『「（くお字き', '「本け、くえ日', '「。。」（お']Passed
control layout['、』ゃあこけ字文', 'お」かーかー。け', 'きー']['、』ゃあこけ字文', 'お」かーかー。け', 'きー']Passed

SHA-256 / 796dd40e40d7bae1e8bf653d6a5d902f55121d573929b04d63ae8bda4065dfb6

2 / The unsuccessful fix

Exit 1
"""Failure Map reference implementation. Python standard library only."""
import json

N = 1
observations = []
def solve(x):
    text, L = x
    NO_START = '、。，．）」』！？ぁぃぅぇぉっゃゅょ'
    NO_END = '（「『'
    HANG = '、。，．'
    lines = []
    pos = 0
    n = len(text)
    while pos < n:
        end = pos + L
        if end >= n:
            lines.append(text[pos:])
            break
        if text[end] in HANG and (end + 1 >= n or text[end + 1] not in NO_START):
            end += 1
        else:
            while end > pos + 1 and text[end] in NO_START:
                end -= 1
            while end > pos + 1 and text[end - 1] in NO_END:
                end -= 1
        lines.append(text[pos:end])
        pos = end
    return lines
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
fixtures = [[('small kana prohibited at line start', ['日本語かっこいい', 4], ['日本語', 'かっこい', 'い']), ('regression: small kana strictness', ['こあ）ー、あ）っこ、「（あ「けけっ。えかきー文', 8], ['こあ）ー、あ）っ', 'こ、「（あ「け', 'けっ。えかきー文']), ('regression: small kana strictness', ['（）字「文版い字ー「版ーっ「。』組字組けあか「', 8], ['（）字「文版い', '字ー「版ーっ', '「。』組字組けあ', 'か「']), ('regression: small kana strictness', ['語かおい。字ー」きくおあけ『', 6], ['語かおい。', '字ー」きくお', 'あけ『']), ('period hangs past the measure', ['日本語文。字組版', 4], ['日本語文。', '字組版']), ('period followed by bracket cannot hang', ['日本語文。」字組', 4], ['日本語', '文。」字', '組']), ('control layout', ['組『「（くお字き「本け、くえ日「。。」（お', 8], ['組『「（くお字き', '「本け、くえ日', '「。。」（お']), ('control layout', ['、』ゃあこけ字文お」かーかー。けきー', 8], ['、』ゃあこけ字文', 'お」かーかー。け', 'きー'])], [('regression: small kana strictness', ['きあ。えーくーゃい', 4], ['きあ。', 'えー', 'くーゃい']), ('regression: small kana strictness', ['本『く、ゃ本かっ', 7], ['本『く、ゃ本', 'かっ']), ('regression: small kana strictness', ['語字、え『えくゃえー』』ーこ組「日『。（', 4], ['語字、え', '『えくゃ', 'え', 'ー』』ー', 'こ組「日', '『。（']), ('regression: small kana strictness', ['けこ。語く「組き語け）おい組文うー', 8], ['けこ。語く「組き', '語け）おい組文', 'うー']), ('closing bracket pushes out', ['日本語文」字組版', 4], ['日本語', '文」字組', '版']), ('period followed by bracket cannot hang', ['日本語文。」字組', 4], ['日本語', '文。」字', '組']), ('control layout', ['、け）「文本、語文『こ（字けこ', 5], ['、け）「文', '本、語文', '『こ（字け', 'こ']), ('control layout', ['け（え）けうけ語「組『けーく字え字', 5], ['け（え）け', 'うけ語「組', '『けーく字', 'え字'])], [('regression: small kana strictness', ['日組こ、『っ、ー日ーあ』っ「、き「字っ', 6], ['日組こ、', '『っ、ー日ー', 'あ』っ「、き', '「字っ']), ('regression: small kana strictness', ['えい語く』うっき版うく『）ゃけか', 3], ['えい語', 'く』', 'うっき', '版うく', '『）ゃ', 'けか']), ('regression: small kana strictness', ['（）字「文版い字ー「版ーっ「。』組字組けあか「', 8], ['（）字「文版い', '字ー「版ーっ', '「。』組字組けあ', 'か「']), ('regression: small kana strictness', ['版っ』い「）ー）。）', 3], ['版っ』', 'い', '「', '）', 'ー', '）。）']), ('opening bracket at line end', ['日本語「文字」組版', 4], ['日本語', '「文字」', '組版']), ('closing bracket pushes out', ['日本語文」字組版', 4], ['日本語', '文」字組', '版']), ('control layout', ['っ日本語字こ（く」『、こう文かいえ。。ー', 8], ['っ日本語字こ', '（く」『、こう文', 'かいえ。。ー']), ('control layout', ['語う版っこう『」', 8], ['語う版っこう『」'])], [('regression: small kana strictness', ['）文っ語（く」（。いお、『』ー版版', 7], ['）文っ語（く」', '（。いお、', '『』ー版版']), ('regression: small kana strictness', ['きあ。えーくーゃい', 4], ['きあ。', 'えー', 'くーゃい']), ('regression: small kana strictness', ['いあ『本く）く。ー', 3], ['いあ', '『本', 'く）', 'く。ー']), ('regression: small kana strictness', ['語字、え『えくゃえー』』ーこ組「日『。（', 4], ['語字、え', '『えくゃ', 'え', 'ー』』ー', 'こ組「日', '『。（']), ('period followed by bracket cannot hang', ['日本語文。」字組', 4], ['日本語', '文。」字', '組']), ('opening bracket at line end', ['日本語「文字」組版', 4], ['日本語', '「文字」', '組版']), ('control layout', ['）、えゃ語うかえ「本あこ（字）ーえ字あか版』', 6], ['）、えゃ語う', 'かえ「本あこ', '（字）ーえ字', 'あか版』']), ('control layout', ['あ。」あ文（け版。日）語え』', 6], ['あ。」あ文', '（け版。日）', '語え』'])], [('regression: small kana strictness', ['版ー『版かゃき組本字』', 5], ['版ー『版', 'かゃき組本', '字』']), ('regression: small kana strictness', ['（日おあ」『こか、語。）本文っ、文えあゃ。', 5], ['（日おあ」', '『こか、', '語。）本', '文っ、文え', 'あゃ。']), ('regression: small kana strictness', ['文。いいおっけー本。う「ういおくかえ', 7], ['文。いいおっ', 'けー本。う「う', 'いおくかえ']), ('regression: small kana strictness', ['きっ文こ」あ。けけききき「日ー文ーか、い。', 7], ['きっ文こ」あ。', 'けけききき', '「日ー文ーか、', 'い。']), ('opening bracket at line end', ['日本語「文字」組版', 4], ['日本語', '「文字」', '組版']), ('period hangs past the measure', ['日本語文。字組版', 4], ['日本語文。', '字組版']), ('control layout', ['版っ日けおく、）」版（「', 6], ['版っ日けお', 'く、）」版', '（「']), ('control layout', ['こあく。（く版「うえけ。。。え', 8], ['こあく。（く版', '「うえけ。。。え'])]]
for label, args, expected in fixtures[N - 1]:
    check(label, solve(args), expected)
print(json.dumps({"observations": observations, "passed": all(x["passed"] for x in observations)}, ensure_ascii=False))
raise SystemExit(0 if all(x["passed"] for x in observations) else 1)
Boundary fixtureActualExpectedOutcome
small kana prohibited at line start['日本語', 'かっこい', 'い']['日本語', 'かっこい', 'い']Passed
regression: small kana strictness['こあ）ー、あ）っ', 'こ、「（あ「け', 'けっ。えかきー文']['こあ）ー、あ）っ', 'こ、「（あ「け', 'けっ。えかきー文']Passed
regression: small kana strictness['（）字「文版い字', 'ー「版ーっ「。』', '組字組けあか「']['（）字「文版い', '字ー「版ーっ', '「。』組字組けあ', 'か「']Failed
regression: small kana strictness['語かおい。字', 'ー」きくおあ', 'け『']['語かおい。', '字ー」きくお', 'あけ『']Failed
period hangs past the measure['日本語文。', '字組版']['日本語文。', '字組版']Passed
period followed by bracket cannot hang['日本語', '文。」字', '組']['日本語', '文。」字', '組']Passed
control layout['組『「（くお字き', '「本け、くえ日', '「。。」（お']['組『「（くお字き', '「本け、くえ日', '「。。」（お']Passed
control layout['、』ゃあこけ字文', 'お」かーかー。け', 'きー']['、』ゃあこけ字文', 'お」かーかー。け', 'きー']Passed

SHA-256 / e46b1263e4cfef294270740103b6089c098e95afaa73ce7b21f7db90757c5f0a

3 / The verified repair

Exit 0
"""Failure Map reference implementation. Python standard library only."""
import json

N = 1
observations = []
def solve(x):
    text, L = x
    NO_START = '、。，．）」』！？ーぁぃぅぇぉっゃゅょ'
    NO_END = '（「『'
    HANG = '、。，．'
    lines = []
    pos = 0
    n = len(text)
    while pos < n:
        end = pos + L
        if end >= n:
            lines.append(text[pos:])
            break
        if text[end] in HANG and (end + 1 >= n or text[end + 1] not in NO_START):
            end += 1
        else:
            while end > pos + 1 and text[end] in NO_START:
                end -= 1
            while end > pos + 1 and text[end - 1] in NO_END:
                end -= 1
        lines.append(text[pos:end])
        pos = end
    return lines
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
fixtures = [[('small kana prohibited at line start', ['日本語かっこいい', 4], ['日本語', 'かっこい', 'い']), ('regression: small kana strictness', ['こあ）ー、あ）っこ、「（あ「けけっ。えかきー文', 8], ['こあ）ー、あ）っ', 'こ、「（あ「け', 'けっ。えかきー文']), ('regression: small kana strictness', ['（）字「文版い字ー「版ーっ「。』組字組けあか「', 8], ['（）字「文版い', '字ー「版ーっ', '「。』組字組けあ', 'か「']), ('regression: small kana strictness', ['語かおい。字ー」きくおあけ『', 6], ['語かおい。', '字ー」きくお', 'あけ『']), ('period hangs past the measure', ['日本語文。字組版', 4], ['日本語文。', '字組版']), ('period followed by bracket cannot hang', ['日本語文。」字組', 4], ['日本語', '文。」字', '組']), ('control layout', ['組『「（くお字き「本け、くえ日「。。」（お', 8], ['組『「（くお字き', '「本け、くえ日', '「。。」（お']), ('control layout', ['、』ゃあこけ字文お」かーかー。けきー', 8], ['、』ゃあこけ字文', 'お」かーかー。け', 'きー'])], [('regression: small kana strictness', ['きあ。えーくーゃい', 4], ['きあ。', 'えー', 'くーゃい']), ('regression: small kana strictness', ['本『く、ゃ本かっ', 7], ['本『く、ゃ本', 'かっ']), ('regression: small kana strictness', ['語字、え『えくゃえー』』ーこ組「日『。（', 4], ['語字、え', '『えくゃ', 'え', 'ー』』ー', 'こ組「日', '『。（']), ('regression: small kana strictness', ['けこ。語く「組き語け）おい組文うー', 8], ['けこ。語く「組き', '語け）おい組文', 'うー']), ('closing bracket pushes out', ['日本語文」字組版', 4], ['日本語', '文」字組', '版']), ('period followed by bracket cannot hang', ['日本語文。」字組', 4], ['日本語', '文。」字', '組']), ('control layout', ['、け）「文本、語文『こ（字けこ', 5], ['、け）「文', '本、語文', '『こ（字け', 'こ']), ('control layout', ['け（え）けうけ語「組『けーく字え字', 5], ['け（え）け', 'うけ語「組', '『けーく字', 'え字'])], [('regression: small kana strictness', ['日組こ、『っ、ー日ーあ』っ「、き「字っ', 6], ['日組こ、', '『っ、ー日ー', 'あ』っ「、き', '「字っ']), ('regression: small kana strictness', ['えい語く』うっき版うく『）ゃけか', 3], ['えい語', 'く』', 'うっき', '版うく', '『）ゃ', 'けか']), ('regression: small kana strictness', ['（）字「文版い字ー「版ーっ「。』組字組けあか「', 8], ['（）字「文版い', '字ー「版ーっ', '「。』組字組けあ', 'か「']), ('regression: small kana strictness', ['版っ』い「）ー）。）', 3], ['版っ』', 'い', '「', '）', 'ー', '）。）']), ('opening bracket at line end', ['日本語「文字」組版', 4], ['日本語', '「文字」', '組版']), ('closing bracket pushes out', ['日本語文」字組版', 4], ['日本語', '文」字組', '版']), ('control layout', ['っ日本語字こ（く」『、こう文かいえ。。ー', 8], ['っ日本語字こ', '（く」『、こう文', 'かいえ。。ー']), ('control layout', ['語う版っこう『」', 8], ['語う版っこう『」'])], [('regression: small kana strictness', ['）文っ語（く」（。いお、『』ー版版', 7], ['）文っ語（く」', '（。いお、', '『』ー版版']), ('regression: small kana strictness', ['きあ。えーくーゃい', 4], ['きあ。', 'えー', 'くーゃい']), ('regression: small kana strictness', ['いあ『本く）く。ー', 3], ['いあ', '『本', 'く）', 'く。ー']), ('regression: small kana strictness', ['語字、え『えくゃえー』』ーこ組「日『。（', 4], ['語字、え', '『えくゃ', 'え', 'ー』』ー', 'こ組「日', '『。（']), ('period followed by bracket cannot hang', ['日本語文。」字組', 4], ['日本語', '文。」字', '組']), ('opening bracket at line end', ['日本語「文字」組版', 4], ['日本語', '「文字」', '組版']), ('control layout', ['）、えゃ語うかえ「本あこ（字）ーえ字あか版』', 6], ['）、えゃ語う', 'かえ「本あこ', '（字）ーえ字', 'あか版』']), ('control layout', ['あ。」あ文（け版。日）語え』', 6], ['あ。」あ文', '（け版。日）', '語え』'])], [('regression: small kana strictness', ['版ー『版かゃき組本字』', 5], ['版ー『版', 'かゃき組本', '字』']), ('regression: small kana strictness', ['（日おあ」『こか、語。）本文っ、文えあゃ。', 5], ['（日おあ」', '『こか、', '語。）本', '文っ、文え', 'あゃ。']), ('regression: small kana strictness', ['文。いいおっけー本。う「ういおくかえ', 7], ['文。いいおっ', 'けー本。う「う', 'いおくかえ']), ('regression: small kana strictness', ['きっ文こ」あ。けけききき「日ー文ーか、い。', 7], ['きっ文こ」あ。', 'けけききき', '「日ー文ーか、', 'い。']), ('opening bracket at line end', ['日本語「文字」組版', 4], ['日本語', '「文字」', '組版']), ('period hangs past the measure', ['日本語文。字組版', 4], ['日本語文。', '字組版']), ('control layout', ['版っ日けおく、）」版（「', 6], ['版っ日けお', 'く、）」版', '（「']), ('control layout', ['こあく。（く版「うえけ。。。え', 8], ['こあく。（く版', '「うえけ。。。え'])]]
for label, args, expected in fixtures[N - 1]:
    check(label, solve(args), expected)
print(json.dumps({"observations": observations, "passed": all(x["passed"] for x in observations)}, ensure_ascii=False))
raise SystemExit(0 if all(x["passed"] for x in observations) else 1)
Boundary fixtureActualExpectedOutcome
small kana prohibited at line start['日本語', 'かっこい', 'い']['日本語', 'かっこい', 'い']Passed
regression: small kana strictness['こあ）ー、あ）っ', 'こ、「（あ「け', 'けっ。えかきー文']['こあ）ー、あ）っ', 'こ、「（あ「け', 'けっ。えかきー文']Passed
regression: small kana strictness['（）字「文版い', '字ー「版ーっ', '「。』組字組けあ', 'か「']['（）字「文版い', '字ー「版ーっ', '「。』組字組けあ', 'か「']Passed
regression: small kana strictness['語かおい。', '字ー」きくお', 'あけ『']['語かおい。', '字ー」きくお', 'あけ『']Passed
period hangs past the measure['日本語文。', '字組版']['日本語文。', '字組版']Passed
period followed by bracket cannot hang['日本語', '文。」字', '組']['日本語', '文。」字', '組']Passed
control layout['組『「（くお字き', '「本け、くえ日', '「。。」（お']['組『「（くお字き', '「本け、くえ日', '「。。」（お']Passed
control layout['、』ゃあこけ字文', 'お」かーかー。け', 'きー']['、』ゃあこけ字文', 'お」かーかー。け', 'きー']Passed

SHA-256 / 4eb0c7c77bcf45d88133849ced98e0149246f76cf285e90a24e4cfc3973f22de

Verification & scope

A deterministic toy typesetting model with integer widths and a stipulated rule set; it does not claim conformance to any engine. This reproducer isolates one failure mechanism. Results cover the supplied fixtures. Variants within a family share a test contract and should remain grouped when constructing evaluation splits. Related mechanisms with a shared evaluation_group must also remain together; these controlled models are not independent production incidents.

Observations recorded using Python 3.12.14 at 2026-09-29T14:49:50.209444+00:00.

Case digest / c4fd46d0ed60b2b2765c5021067fc260191d30f11df7d410209b9e69829d366e