Make sure dotfiles path of fish is set up correctly

fish/config.fish

@@ -1,6 +1,8 @@
-if test "$SHLVL" -le 1
-  set -x DOTFILES {$HOME}/dotfiles
+set -x DOTFILES /Users/thomas/dotfiles
+# The definition of $DOTFILES MUST be the first line of this file
+# Don't change it!
 
+if test "$SHLVL" -le 1
   set -x PATH /usr/local/bin /usr/local/sbin $PATH
   set -x PATH $DOTFILES/bin $PATH
   if test -d $HOME/bin