bad bash completion in ubuntu

=========in 11.10==============

problem:
ls /tmp and a space is added instead of /

solution:
sudo apt-get purge bash-completion

sudo apt-get install bash-completion

problem:

sudo does not autocomplete:

solution

add

complete -cf sudo

in .basrc of the user

===========in 12.04=========
comment the following in /etc/bash_completion

####
# makeinfo and texi2dvi are defined elsewhere.
#
#for i in a2ps awk bash bc bison cat colordiff cp csplit \
#    curl cut date df diff dir du enscript env expand fmt fold gperf gprof \
#    grep grub head indent irb ld ldd less ln ls m4 md5sum mkdir mkfifo mknod \
#    mv netstat nl nm objcopy objdump od paste patch pr ptx readelf rm rmdir \
#    sed seq sha{,1,224,256,384,512}sum shar sort split strip tac tail tee \
#    texindex touch tr uname unexpand uniq units vdir wc wget who; do
#    have $i && complete -F _longopt -o default $i
#done

source: http://stackoverflow.com/questions/11981764/bash-tab-completion-adds-extra-space-after-the-first-completion