Improve vim python filetype settings

after/ftplugin/python.vim

@@ -1,2 +1,26 @@
+" Set up tabs
+setlocal tabstop=4
+setlocal shiftwidth=4
+setlocal expandtab
+
+" Set up text width
 setlocal textwidth=80
+
+" Set up format options
+"   c - Auto-wrap comments using textwidth
+"   r - Automatically insert the current comment leader after hitting <Enter>
+"       in Insert mode
+"   o - Automatically insert the current comment leader after hitting 'o' or
+"       'O' in Normal mode.
 setlocal formatoptions+=cro
+
+" Set up highlighting of tabs
+highlight BadWhitespace ctermbg=red guibg=red
+match BadWhitespace /^\t\+/
+
+" Set up file encoding
+setlocal encoding=utf-8
+
+" Set up file format
+setlocal fileformat=unix
+let python_highlight_all=1