As Joe already says :

"You can write this as an extension method in My Extensions"

public static class MyExtensions
{
public static T DumpFixed<T> (this T toDump, string heading = null,
int? depth = null)
{
Util.WithStyle (toDump, "font-family:consolas").Dump (heading, depth);
return toDump;
}
}

And backed by a Data Grid Result preference setting would be nice.

My personal stylesheet customization is:
body {
font-family: "Lucida Console", Verdana;
font-size: 70%;
background: blue;
color: yellow;
}

```
PanelManager.DisplaySyntaxColoredText(text, SyntaxLanguageStyle.None);
```

@JimBob <3 I came here to make this same report, knowing that there's a fix made my hour.

You can go to Edit -> Preferences -> Results -> Style sheet for text (HTML) results -> Custom -> Launch Editor and add:

body { font-family: monospace; }

...to the the Customisations field.

OK/Apply and re-run your query...