bash error prompt

gistfile1.txt

    PS1="\$(\
         EXIT=\"\$?\" ; \
         RED=\"\[\e[31m\]\" ; \
         WHITE=\"\[\e[0m\]\" ; "
    PS1+="\
         endchar=\"\\$\${WHITE}\" ; \
         if [ \"\$EXIT\" -eq 0 ]; then \
             endchar=\"\${WHITE}\$endchar\" ; \
         else \
             endchar=\"\${RED}[\$(errno \${EXIT})] \$endchar\";\
         fi ; "
    PS1+="echo \"${debian_chroot:+($debian_chroot)}\[\033[01;32m\]\u@\h\[\033[00m\]:\[\033[01;34m\]\w \$endchar \" )"