[Str] more updates

Author: moritz

lib/Str.pod

@@ -95,11 +95,11 @@ an initial titlecase, such as "By" or "And", to produce "by" or "and".
 
 =head2 lcfirst
 
-Perl 6 does not have a C<lcfirst> function.  See X<titlecase>.
+Perl 6 does not have a C<lcfirst> function.
 
 =head2 ucfirst
 
-Perl 6 does not have a C<ucfirst> function.  See X<titlecase>.
+Perl 6 does not have a C<ucfirst> function.  See X<tc>.
 
 =head2 length