doc: document argument variant in the repl.md

`options` in the `repl.start([options])` can be a string. Ref: #10160 PR-URL: #10221 Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
nodejs · Jan 30, 2017 · 5250b33 · 5250b33
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commit 5250b33
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diff --git a/doc/api/repl.md b/doc/api/repl.md
@@ -418,6 +418,15 @@ added: v0.1.91
 
 The `repl.start()` method creates and starts a `repl.REPLServer` instance.
 
+If `options` is a string, then it specifies the input prompt:
+
+```js
+const repl = require('repl');
+
+// a Unix style prompt
+repl.start('$ ');
+```
+
 ## The Node.js REPL
 
 Node.js itself uses the `repl` module to provide its own interactive interface