 Multiple spaces are eliminated by default in most World Wide Web content , regardless of whether they are associated with sentences or not . There are options for preserving spacing , such as the CSS white @-@ space property , and the < pre > tag . Twitter retains extra spaces in user input on their website . HTML also includes several other space entities which are not collapsed , such as an em space , an en space , and a non @-@ breaking space . Some <unk> space characters are also not collapsed on the web . 
