Fix typo and redundant text in the documentation. (#2260)

JerryScript-DCO-1.0-Signed-off-by: Daniel Vince vinced@inf.u-szeged.hu

docs/08.CODING-STANDARDS.md

@@ -704,7 +704,7 @@ typedef struct
   /* Field descriptions do not start with capital letters
    * and there is no full stop at the end. */
   field1_t field1; /**< description of field 1 */
-  field2_t field2; /**< description of field 1 */
+  field2_t field2; /**< description of field 2 */
 
   field_n_t field_n; /**< description of field n */
 } structure_name_t;