Document Str.Numeric uses &val semantics

Author: zoffixznet

doc/Type/Str.pod6

@@ -316,8 +316,8 @@ Defined as:
 
     method Numeric(Str:D: --> Numeric:D)
 
-Coerces the string to L<Numeric>. L<Fails|/routine/fail> with C<X::Str::Numeric>
-if the coercion cannot be done.
+Coerces the string to L<Numeric> using semantics equivalent to L<val> routine.
+L<Fails|/routine/fail> with C<X::Str::Numeric> if the coercion to a number cannot be done.
 
 Only Unicode characters with property C<Nd>, as well as leading and trailing
 whitespace are allowed, with the special case of the empty string being coerced