Divide section 3

[r12a]

3. Text segmentation
   http://w3c.github.io/ilreq/#h_text_segmentation

i think section 3 could be divided into two subsections:

1. word boundaries
2. typographic units

[lianghai]

Agree. And I found it confusing to see certain content here (mentioning Unicode code points, characters, extended grapheme clusters) seemingly should belong to section 2 "Indic orthographic syllable boundaries".

There's even such inaccurate and totally duplicating pieces:

A syllable includes a base consonant and any combination of the following characters in the text stream:

• sequences of consonants preceded by virama (i.e. conjuncts).
• vowel signs
• visarga, anusvara or candrabindu.

[r12a]

@lianghai's point seems to have been fixed in 33e2c15

(when a change is made to the document that fixes a particular issue, it would be helpful to say so in the comment that comes with that commit (including an link to the issue) - it took me a while to figure out why i couldn't find that text, and then to check where it was removed)

The division into subsections is still tbd.

[slata]

The section 3 has been divided into two subsections.