Typo in 4. Robust: "...can be interpreted by by a wide variety..."

[JamesDonnelly]

The description for 4. Robust has a repeated "by":

Content must be robust enough that it can be interpreted by by a wide variety of user agents, including assistive technologies.

https://www.w3.org/TR/WCAG21/#robust

[JamesDonnelly]

For what it's worth, I'm sure this must have been reported before but I couldn't find any relevant open issues describing this.

[awkawk]

Thanks James. I think it is actually more than what you indicate. In WCAG 2.0 the text is:

Content must be robust enough that it can be interpreted reliably by a wide variety of user agents, including assistive technologies.

and in 2.1 it is:

Content must be robust enough that it can be interpreted by by a wide variety of user agents, including assistive technologies.

The Group will file an errata to make the 2.1 text match the 2.0 text.

[awkawk]

Accepted in CFC 9/29/2018 to make the 2.1 text match the 2.0 text for the sentence under the Robust principle: "Content must be robust enough that it can be interpreted reliably by a wide variety of user agents, including assistive technologies."