[minor-fix]Minor cleanups on variable.c comments

src/variable.c

@@ -124,10 +124,10 @@ iv_put(mrb_state *mrb, iv_tbl *t, mrb_sym sym, mrb_value val)
  *   mrb
  *   t     the variable table to be searched.
  *   sym   the symbol to be used as the key.
- *   vp    the value pointer. Recieves the value if the specified symbol contains
- *         in the instance variable table.
+ *   vp    the value pointer. Receives the value if the specified symbol is
+ *         contained in the instance variable table.
  * Returns
- *   true if the specfiyed symbol contains in the instance variable table.
+ *   true if the specified symbol is contained in the instance variable table.
  */
 static mrb_bool
 iv_get(mrb_state *mrb, iv_tbl *t, mrb_sym sym, mrb_value *vp)
@@ -159,10 +159,10 @@ iv_get(mrb_state *mrb, iv_tbl *t, mrb_sym sym, mrb_value *vp)
  * Parameters
  *   t    the variable table to be searched.
  *   sym  the symbol to be used as the key.
- *   vp   the value pointer. Recieve the deleted value if the symbol contans
- *        in the instance varible table.
+ *   vp   the value pointer. Receive the deleted value if the symbol is
+ *        contained in the instance variable table.
  * Returns
- *   true if the specfied symbol contains in the instance variable table.
+ *   true if the specified symbol is contained in the instance variable table.
  */
 static mrb_bool
 iv_del(mrb_state *mrb, iv_tbl *t, mrb_sym sym, mrb_value *vp)