Clarified About Modules section in about-packages-and-modules.mdx (npm#1148)

Updated the About Modules documentation section of
<https://docs.npmjs.com/about-packages-and-modules> to improve clarity
of messaging.

Co-authored-by: Gar <[email protected]>

Author: KCarlile

content/packages-and-modules/introduction-to-packages-and-modules/about-packages-and-modules.mdx

@@ -56,9 +56,11 @@ To be loaded by the Node.js `require()` function, a module must be one of the fo
 
 In the context of a Node program, the `module` is also the thing that was loaded _from_ a file. For example, in the following program:
 
-    var req = require('request')
+```
+var req = require('request')
+```
 
-we might say that "The variable `req` refers to the `request` module".
+The `req` variable refers to the `request` module returned by the `require()` function.
 
 [about-scopes]: about-scopes
 [private-pkgs]: about-private-packages