Fix spelling

include/mruby/array.h

@@ -296,7 +296,7 @@ MRB_API mrb_value mrb_ary_clear(mrb_state *mrb, mrb_value self);
  *
  * @param mrb The mruby state reference.
  * @param ary The target array
- * @param sep The separater, can be NULL
+ * @param sep The separator, can be NULL
  */
 MRB_API mrb_value mrb_ary_join(mrb_state *mrb, mrb_value ary, mrb_value sep);
 

include/mruby/khash.h

@@ -91,7 +91,7 @@ kh_fill_flags(uint8_t *p, uint8_t c, size_t len)
    khval_t: value data type
    kh_is_map: (0: hash set / 1: hash map)
    __hash_func: hash function
-   __hash_equal: hash comparation function
+   __hash_equal: hash comparison function
 */
 #define KHASH_DEFINE(name, khkey_t, khval_t, kh_is_map, __hash_func, __hash_equal) \
   mrb_noreturn void mrb_raise_nomemory(mrb_state *mrb);                 \

include/mruby/string.h

@@ -345,9 +345,9 @@ MRB_API mrb_value mrb_str_new_capa(mrb_state *mrb, size_t capa);
 MRB_API const char *mrb_string_cstr(mrb_state *mrb, mrb_value str);
 /* NULL terminated C string from mrb_value; `str` will be updated */
 MRB_API const char *mrb_string_value_cstr(mrb_state *mrb, mrb_value *str);
-/* obslete: use RSTRING_PTR() */
+/* obsolete: use RSTRING_PTR() */
 MRB_API const char *mrb_string_value_ptr(mrb_state *mrb, mrb_value str);
-/* obslete: use RSTRING_LEN() */
+/* obsolete: use RSTRING_LEN() */
 MRB_API mrb_int mrb_string_value_len(mrb_state *mrb, mrb_value str);
 
 /**
@@ -433,7 +433,7 @@ MRB_API int mrb_str_cmp(mrb_state *mrb, mrb_value str1, mrb_value str2);
  * - Returned string does not contain any NUL characters (but terminator).
  * - It raises an ArgumentError exception if Ruby string contains
  *   NUL characters.
- * - Retured string will be freed automatically on next GC.
+ * - Returned string will be freed automatically on next GC.
  * - Caller can modify returned string without affecting Ruby string
  *   (e.g. it can be used for mkstemp(3)).
  *