Add information about --extra-doc-dir option in the comments

kaiquekandykoga · kaiquekandykoga · commit ac3d4b9e7930 · 2021-12-15T19:13:40.000-03:00
diff --git a/lib/irb.rb b/lib/irb.rb
@@ -62,6 +62,7 @@
 #     -W[level=2]       Same as `ruby -W`
 #     --context-mode n  Set n[0-4] to method to create Binding Object,
 #                       when new workspace was created
+#     --extra-doc-dir   Add an extra doc dir for the doc dialog
 #     --echo            Show result (default)
 #     --noecho          Don't show result
 #     --echo-on-assignment
