[Code Snippet]: copy button style regression in latest unpublished code

[jendowns]

What package(s) are you using?

• carbon-components
• carbon-components-react

Detailed description

The CopyButton inside the CodeSnippet is positioned strangely in the latest, unpublished code on the master branch:

Unfortunately you can't view this regression directly in any main deployment because those deployments, like the React storybook environment, are only updated after a release.

So here are two options to see the regressions:

• Run the latest master branch locally and view the storybook environment
• Take a look inside any recent PR's carbon-components-react deployment, like this one: https://deploy-preview-4760--carbon-components-react.netlify.com/?path=/story/codesnippet--multi-line

[jendowns]

Appears to be related to a class name being left out. I can propose a fix shortly 👍