bug#45660: 28.0.50; Changed word/whitespace syntax

[Juri Linkov]

> Previously, many characters, including u+202F, had the punctuation
> ('.') syntax.  I modified that to be more close to the Unicode
> Character Database (UCD), and u+202F is not a punctuation character
> according to the UCD.  It has the Zs general category, which means
> "space separator", the same as SPC, NBSP, EN SPACE, and others.

So according to the Unicode standard it should have whitespace syntax?

And indeed, I see no reason for similar characters to have different syntax:

  name: NO-BREAK SPACE
  general-category: Zs (Separator, Space)
  syntax:       which means: whitespace

  name: NARROW NO-BREAK SPACE
  general-category: Zs (Separator, Space)
  syntax: w     which means: word

> Removing u+202F and other similar characters from the "punctuation"
> group had the side effect of leaving it at the default 'w' syntax.
>
> Should we make all Zs characters have the ' ' (whitespace) syntax?
> That should be easy, but we should try being consistent in this
> regard.

Should the word characters separated by NO-BREAK SPACE by treated as one word?
If there is no reason to treat space characters as part of words, then all
characters with the Zs general category could have the same whitespace syntax.