Enable syntax higliighting in less(1)

dotfiles/bash/main.bashrc

 
 export LC_COLLATE=C     # make sort upper first
 export EDITOR=vim
+export LESSOPEN="| /usr/bin/src-hilite-lesspipe.sh %s"
+export LESS=' -R '
 
 export PRETTY=color
 export PRETTY_DEBUG_EXCLUDE=inigrep