-C<$^H{regcomp}> (as described in L<perlreapi>) to have each regexp
-constructed in its lexical scope handled by this engine, but it
-differs from other engines in that it also inserts other hooks into
-C<%^H> in the same scope that point to user-defined subroutines to use
-during compilation, execution etc, these are described in
-L</CALLBACKS> below.
+C<$^H{regcomp}> (as described in L<perlreapi> and L<perlpragma>) to
+have each regexp constructed in its lexical scope handled by this
+engine, but it differs from other engines in that it also inserts
+other hooks into C<%^H> in the same scope that point to user-defined
+subroutines to use during compilation, execution etc, these are
+described in L</CALLBACKS> below.