[Editorial] missing word `attribute` in 6.1 section about styling.

[karlcow]

The text is

In SVG 1.1, support for inline style sheets using the ‘style’ element and ‘style’ was not required. In SVG 2, these are required.

Where it should probably be

In SVG 1.1, support for inline style sheets using the ‘style’ element and the ‘style’ attribute was not required. In SVG 2, these are required.

This should also probably be reformulated in a more normative way by turning the sentence around. Something in the spirit of:

conforming SVG viewers (including browsers) MUST support the ‘style’ element and the ‘style’ attribute for inline style sheets.

Note: In SVG 1.1, these were not required.