Add vera rules to check consecutive and trailing empty lines (#3540)

JerryScript-DCO-1.0-Signed-off-by: Dániel Bátyai dbatyai@inf.u-szeged.hu

tests/unit-ext/test-ext-arg.c

@@ -401,7 +401,6 @@ test_validator_prop2_handler (const jerry_value_t func_obj_val, /**< function ob
 
   jerry_value_t is_ok = jerryx_arg_transform_args (args_p, args_cnt, mapping, ARRAY_SIZE (mapping));
 
-
   TEST_ASSERT (!jerry_value_is_error (is_ok));
 
   if (validator_prop_count == 1)
@@ -622,7 +621,6 @@ test_validator_array1_handler (const jerry_value_t func_obj_val, /**< function o
 
   jerry_value_t is_ok = jerryx_arg_transform_args (args_p, args_cnt, mapping, ARRAY_SIZE (mapping));
 
-
   TEST_ASSERT (!jerry_value_is_error (is_ok));
 
   if (validator_array_count == 0)

tests/unit-ext/test-ext-method-register.c

@@ -185,7 +185,6 @@ test_error_setvalue (void)
   jerry_cleanup ();
 } /* test_error_setvalue */
 
-
 /**
  * Test registration error with jerryx_set_properties.
  *