minor fixes

objectives:

- "Explain keyboard key combination."

- "Locate documentation for general matters of style in The Carpentries."

- "Identify uses of the span of code markdown feature."

- "Identify uses of the span of code Markdown feature."

keypoints:

- "The Carpentries Handbook contains a style guid."

- "The Carpentries Handbook contains a style guide."

- "Keyboard actions are described using the `<kbd>` HTML tag."

- "The backtick (_\`_) is used as a span of code indicator to enclode code, filenames, and 

  text to type that appears within in narrative text."

---

This episode contains lesson-specifc style guidance and related implementation details related to The Carpentries lesson template.  For more general matters of style, see the 

[Style Guide](https://docs.carpentries.org/topic_folders/communications/style-guide.html) 

in The Carpentries Handbook.

[The Carpentries Style Guide](https://docs.carpentries.org/topic_folders/communications/style-guide.html).

## Emphasis