README.md in ribimaybe-0.0.13 vs README.md in ribimaybe-0.1.0

@@ -80,25 +80,26 @@
 ``` ruby
 include Ribimaybe::Maybe
 
 # Chain together computations and pretend you're a Haskeller.
 Just(42).bind do |x|
-  rturn(x - 21)
-end.bind do |x|
-  rturn(x * 2)
+  unit(x - 21).bind do |y|
+    if x * x > 100 then unit(x) else unit(y) end
+  end
 end # => Just(42)
 
 # You guessed it! If have Nothing, you get Nothing.
 Nothing.bind do |x|
-  rturn(x * x)
+  unit(x * x)
 end # => Nothing
 
-# We even have >= but you need to pass a Proc or a lambda.
+# We even have >>= but it's called >= and you you need to pass a Proc or a
+# lambda.
 Just(42) >= -> (x) do
-  rturn(x - 21) >= -> (y) do
-    if x * x > 100 then rturn(y) else rturn(x) end
+  unit(x - 21) >= -> (y) do
+    if x * x > 100 then unit(x) else unit(y) end
   end
-end
+end # => Just(42)
 ```
 
 ## Contributing
 
 1. Fork it