Expansion: Thin space (U+2006) and narrow no-break space (U+202F)

[mach]

By typographic convention, a thin spaced is used in some special cases, for instance, as a thousands separator, or, in French, as a guillemets separator, or, in German, in abbreviated phrases such as «z. B.». Since the Ubuntu font does not feature a thin space, applications will use replacement thin spaces from other fonts. In the worst of cases, these replacements are no thinner than Ubuntu's regular space.

Proposed solution: Assign U+2006 THIN SPACE and U+202F NARROW NO-BREAK SPACE to a glyph that has half the width of the regular space character (U+0020). Probably not in Ubuntu Mono.