.vimrc

autocmd BufWritePre *.pp :s/\s\+$//e

set tabstop=2 shiftwidth=2

set autoindent
set expandtab
set ruler

filetype plugin on
autocmd FileType python set tabstop=4 shiftwidth=4

syntax on

highlight OverLength ctermbg=darkred ctermfg=white guibg=#FFD9D9
match OverLength /\%>70v.\+/
if exists('+colorcolumn')
  set colorcolumn=70
else
  au BufWinEnter * let w:m2=matchadd('ErrorMsg', '\%>70v.\+', -1)
endif

highlight ExtraWhitespace ctermbg=red guibg=red
match ExtraWhitespace /\s\+$/
autocmd BufWinEnter * match ExtraWhitespace /\s\+$/
autocmd InsertEnter * match ExtraWhitespace /\s\+\%#\@<!$/
autocmd InsertLeave * match ExtraWhitespace /\s\+$/
autocmd BufWinLeave * call clearmatches()

@jangaraj