[gap-analysis] Add discussions on punctuation related sections

[himorin]

Add discussion results from Aug 8 F2F for punctuation, on JLReq sections 3.1.1, 3.1.2, 3.1.3, 3.1.4, 3.1.5, 3.1.6.

@r12a there is punctuation section (3.7) in typographic index, but not in neither Japanese gap-analysis nor language matrix. In some other language, like eurlreq/Dutch has some note on punctuation handling by line break in 4.3 Text alignment & justification, are we better to find these suitable place and to put above sections into suitable place(s)?

[himorin]

among this, 3.1.1 (not a css issue), 3.1.2 (ok), 3.1.6 (ok) does not need issues labeled as 'gap'.
also gap-analysis issues are submitted (although might need edits) as follows:

• 3.1.3: as Exceptional positioning of ideographic comma and katakana middle dot in vertical text #180
• 3.1.4: as Positioning of consecutive opening brackets, closing brackets, commas, full stops and middle dots #181
• 3.1.5: as Positioning of opening brackets at line head #182

so, propose to close this issue. /cc @kidayasuo @r12a

[himorin]

closing this, gap issues are already filed.