pseudo-class content's value need use Unicode，otherwise，sometime will load messy code。需要用Unicode作为content的值,否则偶尔会出现乱码 #1687
Description
.@{calendar-prefix-cls}-prev-century-btn,
.@{calendar-prefix-cls}-prev-decade-btn,
.@{calendar-prefix-cls}-prev-year-btn {
left: 7px;
&::after {
content: '«'; // problem: pseudo-class content's value need use Unicode，otherwise，sometime will load messy code。需要用Unicode作为content的值,否则偶尔会出现乱码
}
}