Harmonise inline-size with CSS Logical properties

[dstorey]

from @AmeliaBR

allowing number as a replacement for length happens automatically in all presentation attributes, see https://svgwg.org/svg2-draft/types.html#syntax. Explicitly allowing number in the CSS grammar allows it in the style property, too (this is needed for many SVG-specific properties from SVG 1). Since this [inline-size] is a new property, there is no legacy reason to allow plain number in the CSS property, it is probably best to harmonize with the definition in Logical Properties.

[boggydigital]

Not blocking updated 2.0 CR publication - assigning 2.0 Recommendation milestone to clean this up before 2.0 REC

[css-meeting-bot]

The Working Group just discussed Harmonize `inline-size` .

The full IRC log of that discussion

<AmeliaBR> Topic: Harmonize `inline-size`
<AmeliaBR> GitHub: https://github.com//issues/436
<AmeliaBR> Tav: I could probably do this, not sure what's needed.
<AmeliaBR> Amelia: This was just about removing plain number from the syntax, since there is no legacy need.
<AmeliaBR> Tav: OK, that's reasonable.

[dirkschulze]

Adding needs testing since it is a change to the spec. At least one test for SVG should be added.