Prompt manipulation errs if PS1 contained spaces

[0xmohit]

This isn't anything but a quoting issue. The default value of PS1 on ubuntu results in the following while issuing source gvp:

env: \w\a\]${debian_chroot:+($debian_chroot)}\u@\h:\w\$: No such file or directory

Adding set -x to gvp before sourcing it explains it:

++ gvp
++ case "$1" in
++ store_current_prompt
+++ current_prompt
+++ echo '\[\e]0;\u@\h:' '\w\a\]${debian_chroot:+($debian_chroot)}\u@\h:\w\$'
++ store_prompt '\[\e]0;\u@\h: \w\a\]${debian_chroot:+($debian_chroot)}\u@\h:\w\$'
++ PROMPT_MANIPULATION_OLD='\[\e]0;\u@\h: \w\a\]${debian_chroot:+($debian_chroot)}\u@\h:\w\$'
++ export PROMPT_MANIPULATION_OLD
++ env 'PROMPT_MANIPULATION_OLD=\[\e]0;\u@\h:' '\w\a\]${debian_chroot:+($debian_chroot)}\u@\h:\w\$'
env: \w\a\]${debian_chroot:+($debian_chroot)}\u@\h:\w\$: No such file or directory
++ prompt_manipulation_old='\[\e]0;\u@\h: \w\a\]${debian_chroot:+($debian_chroot)}\u@\h:\w\$'
++ prefix_prompt '(gvp)'
++ PS1='(gvp)\[\e]0;\u@\h: \w\a\]${debian_chroot:+($debian_chroot)}\u@\h:\w\$ '
++ mkdir -p .godeps/src .godeps/pkg .godeps/bin
++ ln -snf .godeps/bin bin
+++ pwd
++ GVP_DIR=/home/user/.godeps
++ GOBIN=/home/user/.godeps/bin
++ GOPATH=/home/user/.godeps:/home/user:
++ PATH=/home/user/.godeps/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/tmp/go/bin
++ export GOBIN GOPATH GVP_NAME PATH
++ echo '>> Local GOPATH set.'
>> Local GOPATH set.
++ '[' -n '' ']'