fix adding space padding to section caused by PR1157
fix adding space padding to section caused by PR1157

fixes #1158

yzhou61/vim-airline,tschundler/dotfiles,rchicoli/vim-airline,vim-IDE/vim-airline,unphased/vim-airline,HarmtH/vim-airline,dalguji/vim-airline,bling/vim-airline,tschundler/dotfiles,tschundler/dotfiles,chrisbra/vim-airline