doc: add util.inspect() legacy signature

siddhant1 · vsemozhetbyt · commit 5e63cf29bfd0 · 2018-10-08T23:19:09.000+03:00
PR-URL: nodejs#23216 Fixes: nodejs#23205 Reviewed-By: Vse Mozhet Byt <vsemozhetbyt@gmail.com> Reviewed-By: James M Snell <jasnell@gmail.com>
diff --git a/doc/api/util.md b/doc/api/util.md
@@ -361,6 +361,7 @@ stream.write('With ES6');
 ```
 
 ## util.inspect(object[, options])
+## util.inspect(object[, showHidden[, depth[, colors]]])
 <!-- YAML
 added: v0.3.0
 changes:
