Fixed version string comparison

dotfiles/git-universe/setup

-#!/bin/sh
+#!/bin/bash
 
 gitver=`git --version | cut -d ' ' -f 3`
 
-if [ "$gitver" > "1.8" ]; then
+if [[ "$gitver" > "1.8" ]]; then
     tilde='~'
 else
     tilde=$HOME