Fix formatting and a partly broken link

Author: Jan-Olof Hendig

doc/Type/Dateish.pod6

@@ -57,7 +57,7 @@ default formatter is used.  In that case the method will return a
 Callable type object.
 
 The formatting function is called by
-L<DateTime method Str|/type/DateTime#method Str> with the
+L<DateTime method Str|/type/DateTime#method_Str> with the
 invocant as its only argument.
 
     my $dt = Date.new('2015-12-31');  # (no formatter specified)
@@ -187,8 +187,8 @@ Defined as:
 Returns the date in C<YYYY-MM-DD> format (L<ISO 8601|https://en.wikipedia.org/wiki/ISO_8601>)
 
 =begin code :ok-test<dd>
-    say Date.new("2015-11-15").yyyy-mm-dd;   # OUTPUT: «2015-11-15␤»
-    say DateTime.new(1470853583).yyyy-mm-dd; # OUTPUT: «2016-08-10␤»
+say Date.new("2015-11-15").yyyy-mm-dd;   # OUTPUT: «2015-11-15␤»
+say DateTime.new(1470853583).yyyy-mm-dd; # OUTPUT: «2016-08-10␤»
 =end code
 
 =head2 method daycount