[DOC] Link IO to the official document

nobu · nobu · commit a94e4f311c20 · 2025-10-27T16:27:32.000+09:00
diff --git a/docs/io.rb b/docs/io.rb
@@ -1,8 +1,8 @@
-# :stopdoc:
+# The {built-in class for I/O}[https://docs.ruby-lang.org/en/master/IO.html].
 class IO
+  # :stopdoc:
   module generic_readable
   end
   module generic_writable
   end
 end
-# :startdoc:
