In prior releases, failure to do this raised a deprecation warning.
-=head2 Splitting the tokens C<(?> and C<(*> in regular expressions is
-now a fatal compilation error.
+=head2 Splitting the tokens C<(?> and C<(*> in regular expressions is now a fatal compilation error.
These had been deprecated since v5.18.
bracketed character classes (those enclosed in square brackets:
C<[...]>).
-=head2 Using a NO-BREAK space in a character alias for C<\N{...}> is now
-deprecated
+=head2 Using a NO-BREAK space in a character alias for C<\N{...}> is now deprecated
This non-graphic character is essentially indistinguishable from a
regular space, and so should not be allowed. See