doc: fix return type of server.address()

starkwang · starkwang · commit 2966e7d18937 · 2018-08-01T08:08:08.000+08:00
diff --git a/doc/api/net.md b/doc/api/net.md
@@ -114,7 +114,7 @@ Emitted when the server has been bound after calling [`server.listen()`][].
 added: v0.1.90
 -->
 
-* Returns: {Object}
+* Returns: {Object|string}
 
 Returns the bound `address`, the address `family` name, and `port` of the server
 as reported by the operating system if listening on an IP socket
