[request for comment] edits to examples for Visible Controls (issue 1455)

Hello all,

Following up on my action item from our Tuesday, Feb. 9 meeting, I've
worked on text revisions to the *examples* section for visible controls.

Please find the revisions in this [Google Doc: [edits to examples] WCAG
3.2.7 Visible Controls
<https://docs.google.com/document/d/1ucVswvHLPL5ZrcohWyh1HC5qiezno8uDgowkgGNKt2U/edit?usp=sharing>

I look forward to your feedback.

Thank you, Alastair, for taking time to follow up with me and ensure that I
understand process. If I've made any mistakes, I look forward to being
corrected and learning from them.

Warmly,

Rain