Test ExtTagAtk

normal=

print('hello')

| cmd_sub=

print('test')

| backtick=

print('test')

| semi=

print('test')

| empty_content=

| math=true:解析失败 (SVG（MathML可通过浏览器插件启用）：从服务器“https://wikimedia.org/api/rest_v1/”返回无效的响应（“Math extension cannot connect to Restbase.”）：): {\displaystyle \frac{1}{2}}