Fix misleading comments

Josh Kupershmidt

contrib/pgcrypto/pgp-compress.c

@@ -105,7 +105,7 @@ compress_init(PushFilter *next, void *init_arg, void **priv_p)
 
 /* writes compressed data packet */
 
-/* cant handle zero-len incoming data, but shouldnt */
+/* can handle zero-len incoming data, but shouldn't */
 static int
 compress_process(PushFilter *next, void *priv, const uint8 *data, int len)
 {

src/pl/plperl/plperl_helpers.h

@@ -62,7 +62,7 @@ sv2cstr(SV *sv)
 		(SvTYPE(sv) > SVt_PVLV && SvTYPE(sv) != SVt_PVFM))
 		sv = newSVsv(sv);
 	else
-		/* increase the reference count so we cant just SvREFCNT_dec() it when
+		/* increase the reference count so we can just SvREFCNT_dec() it when
 		 * we are done */
 		SvREFCNT_inc(sv);