[DOC] Add empty io.rb for IO#pathconf to satisfy the coverage

nobu · nobu · commit 0353d7c8ee4c · 2023-12-20T14:40:25.000+09:00
diff --git a/lib/io.rb b/lib/io.rb
@@ -0,0 +1,3 @@
+# :stopdoc:
+class IO;end
+# :startdoc:
