Fix broken markup

Author: lumimies

S17-concurrency.pod

@@ -296,7 +296,7 @@ It's possible to add a timer using the keyword C<wait> followed by the number of
 
 The construct as a whole returns the result of whichever block was selected.
 
-It's also possible to process a variadic list of channels together, using generic code that works over some set of the channels (use C<*> to represent any of them).  The index and the received value are passed to the code as named arguments C<$:k> and <$:v> (possibly via priming if the code is instantiated ahead of time).
+It's also possible to process a variadic list of channels together, using generic code that works over some set of the channels (use C<*> to represent any of them).  The index and the received value are passed to the code as named arguments C<$:k> and C<$:v> (possibly via priming if the code is instantiated ahead of time).
 
     earliest * {
         more @channels { say "Channel $:k received, result was: ", $:v }