Documentation tweaks from review feedback

gum/README.md

@@ -44,19 +44,19 @@ To use Disqus, add the Disqus site name via the following variable.
 DISQUS_SITENAME = ''
 ```
 
-To add extra CSS, eg to override styles without forking the Gum theme,
+To add extra CSS, for example to override styles without forking the Gum theme,
 you may specify either or both of these settings:
 
 ```
 CUSTOM_CSS_FILES = ['list of paths to additional css static files']
 CUSTOM_CSS_URLS = ['list of URLs of additional remote css to load']
 ```
 
-To add extra Javascript to the theme, you may either or both of these settings:
+To add extra Javascript to the theme, you may specify either or both of these settings:
 
 ```
-CUSTOM_JS_FILES = ['list of paths to additional js static files']
-CUSTOM_JS_URLS = ['list of URLs of additional js to load']
+CUSTOM_JS_FILES = ['list of paths to additional JavaScript static files']
+CUSTOM_JS_URLS = ['list of URLs of additional JavaScript to load']
 
 ```