Link to Help class in configure-help.js and README.

Readme.md

@@ -919,7 +919,7 @@ The data properties are:
 - `sortOptions`: sort the options alphabetically
 - `showGlobalOptions`: show a section with the global options from the parent command(s)
 
-There are methods getting the visible lists of arguments, options, and subcommands. There are methods for formatting the items in the lists, with each item having a _term_ and _description_. Take a look at `.formatHelp()` to see how they are used.
+You can override any method on the [Help](./lib/help.js) class. There are methods getting the visible lists of arguments, options, and subcommands. There are methods for formatting the items in the lists, with each item having a _term_ and _description_. Take a look at `.formatHelp()` to see how they are used.
 
 Example file: [configure-help.js](./examples/configure-help.js)
 

examples/configure-help.js

@@ -5,6 +5,8 @@ const program = new commander.Command();
 
 // This example shows a simple use of configureHelp.
 // This is used as an example in the README.
+// Any method on the Help class can be overridden
+// See: https://github.com/tj/commander.js/blob/master/lib/help.js
 
 program.configureHelp({
   sortSubcommands: true,