Improve word-break

[rgaiacs]

What is the problem?

In https://swcarpentry.github.io/git-novice/04-changes.html, we have

Note that --graph is break into -- and graph.

Add the CSS

word-break: keep-all;

to the <code> element will improve the reading. The new render is

Location of problem (optional)

https://swcarpentry.github.io/git-novice/04-changes.html