/* Warning: PL_parser
* For perl versions earlier than 5.9.5, this is an always
* non-NULL dummy. Also, it cannot be dereferenced. Don't
- * use it if you can avoid is and unless you absolutely know
+ * use it if you can avoid it, and unless you absolutely know
* what you're doing.
* If you always check that PL_parser is non-NULL, you can
* define DPPP_PL_parser_NO_DUMMY to avoid the creation of