Fix typos [ci skip]

2020-03-19 18:11:57 +09:00 · 2020-03-19 18:11:57 +09:00 · 7cc7627c2d
--- a/internal.h
+++ b/internal.h
@ -30,7 +30,7 @@

 #include "ruby/ruby.h"

-/* Folowing macros were formerlly defined in this header but moved to somewhere
+/* Following macros were formerly defined in this header but moved to somewhere
 * else.  In order to detect them we undef here. */

 /* internal/error.h */