突然发现 Wordpress 会很贱地保留源文件中的换行，这是否意味着我将不能用 Emacs 写 blog？
:::C++
#include "stdio.h"
int main()
{
printf("Hello world!\n");
return 0;
}
$$int_0^infty frac{1}{x}textrm{d}x$$
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