There "^G" before names. It happens only when using vim in terminal. It is normal in MacVim.
Here's the image
I tried export LC_ALL=en_US.utf-8 export LANG="$LC_ALL" but it doesn't work.
Put let g:NERDTreeNodeDelimiter = "\u00a0" in your .vimrc
let g:NERDTreeNodeDelimiter = "\u00a0"