* Fixed incorrect instruction: "Press ⌘ to copy"

It needed to be "Press ⌘C to copy"

* Updated to concatenate copy string

Updated copy command to concatenated string to prevent potential issues

* Updated the way the copy string concatenates

As per excellent suggestion by @tomlutzenberger

* Removed semicolon line endings

;P

* var not const or let

️️️ https://github.com/twbs/bootstrap/graphs/contributors

Fixes #17584
Closes #17607 by merging it

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Things left:
1. clear the selection after copy
2. add messages for success and error

Fixes #17196
Closes #17510

Anchor.js 1.0.0 drops the need to use anchor.css, so we remove it
from the codebase and move any leftover styles over to docs.css.

Closes #16488 by merging it.

This reverts commit 229e8889.

ZeroClipboard v2.x drops IE < 9 support.

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Fixes #16269.
Closes #16301 by merging a rebased version of it.

Currently these errors are only reported in the JavaScript console, not in the Customizer UI.
Refs #15296

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