Change the mdash character to ndash

Hi,

I'd like to change all of m-dash character of the site to n-dash character.

After some searching, i found these code below but it's not works.

remove_filter( 'the_title' , 'wptexturize'  );
remove_filter( 'the_content' , 'wptexturize' );
remove_filter( 'the_excerpt' , 'wptexturize' );
remove_filter( 'comment_text' , 'wptexturize' );
remove_filter( 'list_cats' , 'wptexturize' );
remove_filter( 'the_description' , 'wptexturize' );

Could you help me take a look?

Thanks,
Tuan.

p/s: you can using grant access for closer look.