fix

doc/RTFM.md

@@ -285,9 +285,9 @@ Race freeness at this level can be argued from:
   
 ```rust
     ...
-    LOW.claim_mut_new(b, t, |_low, b, t| {
+    LOW.claim_mut(b, t, |_low, b, t| {
         rtfm::bkpt();
-        LOW.claim_mut_new(b, t, |_high, _, _| {
+        LOW.claim_mut(b, t, |_high, _, _| {
             rtfm::bkpt();
         });
     });