['invalididentifier', 'invalid !"#$%&\'()*+,./:;<=>?@[\\]^`{|}~ identifier', []],
// Verify that an identifier starting with a digit is replaced.
['_cssidentifier', '1cssidentifier', []],
['invalididentifier', 'invalid !"#$%&\'()*+,./:;<=>?@[\\]^`{|}~ identifier', []],
// Verify that an identifier starting with a digit is replaced.
['_cssidentifier', '1cssidentifier', []],