CLDR-19207 Fix spaces in UnicodeSet string literals

[macchiati]

CLDR-19207

• This PR completes the ticket.

ALLOW_MANY_COMMITS=true

[macchiati]

There will be more to come on this ticket, namely:

• add a unit test to verify that there aren't any spaces in any UnicodeSet syntax (exemplars, parseLenient, transforms, etc.

But this part can go into the pre-freeze CLDR-49

[macchiati]

@eggrobin FYI

[markusicu]

thanks!