* - strip "ignorable" (@ref UTF8PROC_IGNORE) characters, control characters (@ref UTF8PROC_STRIPCC), or combining characters such as accents (@ref UTF8PROC_STRIPMARK)
* - strip "ignorable" (@ref UTF8PROC_IGNORE) characters, control characters (@ref
* UTF8PROC_STRIPCC), or combining characters such as accents (@ref UTF8PROC_STRIPMARK)