manage tabs as spaces, auto-indent on

dot_vimrc

@@ -81,6 +81,14 @@ set title
 " Start scrolling three lines before the horizontal window border
 set scrolloff=3
 
+filetype plugin indent on
+" show existing tab with 4 spaces width
+set tabstop=4
+" when indenting with '>', use 4 spaces width
+set shiftwidth=4
+" On pressing tab, insert 4 spaces
+set expandtab
+
 " Default colors for highlighting search result
 hi Search ctermfg=White
 hi Search ctermbg=DarkMagenta