shell-script-mode case indenting

[Dan Jacobson]

Pressing TAB on each line in this file.sh produces the first line of
this case expression indented different than the rest:
(sed 's/.$/ &/'|while read route company; do case $company in
        r)set 仁友 Renyou;;
            z)set 台中 Taizhong;;
            q)set 全航 Quanhang;;
            j)set 巨業 Juye;;
            t)set 統聯 Tonglian;;
            *)echo $company: HUH? 1>&2;exit 55;;
        esac; echo "[[分類:業者 ${1}客運 - Operator $2 Bus Co.]]" \
            >> $route; done)<<EOF
001r
005q
006r
EOF