concurrency.md

@@ -152,7 +152,7 @@ expect.
 > performance issue.  It is always correct to make a concurrent
 > call, but it might be more efficient to make a non-concurrent
 > call if the call does not block.  An implementation might
-> implement \*all\* calls as concurrent, for simplicity.
+> implement *all* calls as concurrent, for simplicity.
 
 >
 > Against: John Meacham says "The FFI is inherently unsafe. We