A nested List:

Empty elements

HTML elements without content are called empty elements. In HTML5 empty elements only have an opening tag.

White space

White space is ignored.Normally HTML will truncate spaces in your text. If you write 10 spaces in your text HTML will remove 9 of them. To add lots of spaces to your text, use the   character entity. (non-breaking space)

Angela Chang - one space in between

Angela  Chang - two spaces in beteen