Define IO#read/write_nonblock with builtins.

IO#read/write_nonblock methods are defined in prelude.rb with
special private method __read/write_nonblock to reduce keyword
parameters overhead. We can move them into io.rb with builtin
functions.

1 files changed, 1 insertions, 0 deletions

diff --git a/.document b/.document
index c0c9cded79..2a76ac0705 100644
--- a/.document
+++ b/.document
@@ -13,6 +13,7 @@ rbconfig.rb
 
 trace_point.rb
 ast.rb
+io.rb
 
 # the lib/ directory (which has its own .document file)
 lib