[Typo]: em dash spacing

[pwbriggs]

Summary

Throughout the documentation, there's inconsistent use of the em dash (—, or —). Sometimes there's spaces surrounding them, and sometimes not.

Page

N/A

Details

Typically, em dashes are used without surrounding spaces. Personally, I prefer that style. However, I think whichever's fine as long as you follow a consistent style throughout.

I can open a PR making all these changes once I know which way we want to go: spaces or not.

[rickhanlonii]

Let's make it consistent (and correct) by removing the spaces.