Issue with gist indentation

Question

When creating a Gist on Github there is a setting for indentation (tabs or spaces; size 2, 4, or 8). After setting indents to tabs size 4, it changes to tabs size 8 after I save it. Editing it afterwords doesn't do anything. Other settings don't produce the expected result either. Am I misunderstanding this feature somehow? Can't find any documentation regarding this.

Answer 1

I replaced tabs with four spaces in Notepad++ (Ctrl+H), and it works. You can use any numbers of spaces.

Those tabs are automatically displayed as a 8-character-tab in Github Gist.