.bashrc：语法错误：文件意外结束

我不知道如何解决这个错误。

bash：/home/dery/.bashrc：第168行：语法错误：文件意外结束

这是我的.bashrc：

case $- in
    *i*) ;;
      *) return;;
esac

HISTCONTROL=ignoreboth

shopt -s histappend

HISTSIZE=1000
HISTFILESIZE=2000

shopt -s checkwinsize

[ -x /usr/bin/lesspipe ] && eval "$(SHELL=/bin/sh lesspipe)"

if [ -z "${debian_chroot:-}" ] && [ -r /etc/debian_chroot ]; then
    debian_chroot=$(cat /etc/debian_chroot)
fi

case "$TERM" in
    xterm-color) color_prompt=yes;;
esac

if [ -n "$force_color_prompt" ]; then
    if [ -x /usr/bin/tput ] && tput setaf 1 >&/dev/null; then
        color_prompt=yes
    else
        color_prompt=
    fi
fi

if [ "$color_prompt" = yes ]; then
    PS1='${debian_chroot:+($debian_chroot)}\[\033[01;32m\]\u@\h\[\033[00m\]:\[\033[01;34m\]\w\[\033[00m\]\$ '
else
    PS1='${debian_chroot:+($debian_chroot)}\u@\h:\w\$ '
fi
unset color_prompt force_color_prompt

if [ -x /usr/bin/dircolors ]; then
    test -r ~/.dircolors && eval "$(dircolors -b ~/.dircolors)" || eval "$(dircolors -b)"
    alias ls='ls --color=auto'
    alias grep='grep --color=auto'
    alias fgrep='fgrep --color=auto'
    alias egrep='egrep --color=auto'
fi

alias ll='ls -alF'
alias la='ls -A'
alias l='ls -CF'

alias alert='notify-send --urgency=low -i "$([ $? = 0 ] && echo terminal || echo error)" "$(history|tail -n1|sed -e '\''s/^\s*[0-9]\+\s*//;s/[;&|]\s*alert$//'\'')"'

if [ -f ~/.bash_aliases ]; then
    . ~/.bash_aliases
fi

if ! shopt -oq posix; then
  if [ -f /usr/share/bash-completion/bash_completion ]; then
    . /usr/share/bash-completion/bash_completion
  elif [ -f /etc/bash_completion ]; then
    . /etc/bash_completion
  fi
fi

case "$TERM" in
xterm*|rxvt*)
    PS1="\[\e]0;${debian_chroot:+($debian_chroot)}\$(print_title)\a\]$PS1"
    __el_LAST_EXECUTED_COMMAND=""
    print_title () 
    {
        __el_FIRSTPART=""
        __el_SECONDPART=""
        if [ "$PWD" == "$HOME" ]; then
            __el_FIRSTPART=$(gettext --domain="pantheon-files" "Home")
        else
            if [ "$PWD" == "/" ]; then
                __el_FIRSTPART="/"
            else
                __el_FIRSTPART="${PWD##*/}"
            fi
        fi
        if [[ "$__el_LAST_EXECUTED_COMMAND" == "" ]]; then
            echo "$__el_FIRSTPART"
            return
        fi
        #trim the command to the first segment and strip sudo
        if [[ "$__el_LAST_EXECUTED_COMMAND" == sudo* ]]; then
            __el_SECONDPART="${__el_LAST_EXECUTED_COMMAND:5}"
            __el_SECONDPART="${__el_SECONDPART%% *}"
        else
            __el_SECONDPART="${__el_LAST_EXECUTED_COMMAND%% *}"
        fi 
        printf "%s: %s" "$__el_FIRSTPART" "$__el_SECONDPART"
    }
    put_title()
    {
        __el_LAST_EXECUTED_COMMAND="${BASH_COMMAND}"
        printf "\033]0;%s\007" "$1"
    }

    # Show the currently running command in the terminal title:
    # http://www.davidpashley.com/articles/xterm-titles-with-bash.html
    update_tab_command()
    {
        # catch blacklisted commands and nested escapes
        case "$BASH_COMMAND" in 
            *\033]0*|update_*|echo*|printf*|clear*|cd*)
            __el_LAST_EXECUTED_COMMAND=""
                ;;
            *)
            put_title "${BASH_COMMAND}"
            ;;
        esac
    }
    preexec_functions+=(update_tab_command)
    ;;
*)
    ;;