doc: clarify repl exception conditions

The sample code demonstrating ERR_INVALID_REPL_INPUT is confusing, I
think. This simplifies and clarifies it a bit, I hope.

Author: Trott

doc/api/repl.md

@@ -163,30 +163,21 @@ This use of the [`domain`][] module in the REPL has these side effects:
 
 * Uncaught exceptions only emit the [`'uncaughtException'`][] event in the
   standalone REPL. Adding a listener for this event in a REPL within
-  another Node.js program throws [`ERR_INVALID_REPL_INPUT`][].
-* Trying to use [`process.setUncaughtExceptionCaptureCallback()`][] throws
-  an [`ERR_DOMAIN_CANNOT_SET_UNCAUGHT_EXCEPTION_CAPTURE`][] error.
-
-As standalone program:
-
-```js
-process.on('uncaughtException', () => console.log('Uncaught'));
+  another Node.js program results in [`ERR_INVALID_REPL_INPUT`][].
 
-throw new Error('foobar');
-// Uncaught
-```
+  ```js
+  const r = repl.start();
 
-When used in another application:
+  r.write('process.on("uncaughtException", () => console.log("Foobar"));\n');
+  // Output stream includes:
+  //   TypeError [ERR_INVALID_REPL_INPUT]: Listeners for `uncaughtException`
+  //   cannot be used in the REPL
 
-```js
-process.on('uncaughtException', () => console.log('Uncaught'));
-// TypeError [ERR_INVALID_REPL_INPUT]: Listeners for `uncaughtException`
-// cannot be used in the REPL
+  r.close();
+  ```
 
-throw new Error('foobar');
-// Thrown:
-// Error: foobar
-```
+* Trying to use [`process.setUncaughtExceptionCaptureCallback()`][] throws
+  an [`ERR_DOMAIN_CANNOT_SET_UNCAUGHT_EXCEPTION_CAPTURE`][] error.
 
 #### Assignment of the `_` (underscore) variable
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