fixed error in shell script for comparing character strings

test/rock_mem.sh

@@ -222,8 +222,8 @@ lst2=`cat tmp/klebsiella_100_2_13_qual_thres.fq|grep @S|cut -d ' ' -f 1|sort`
 
 lst_ref=`cat ${srcdir}/data/non_regression/ids_read_kept_q13m300.txt`
 
-test "$lst1" == "$lst2" || exit 1671
-test "$lst_ref" == "$lst1" || exit 1672
+test "$lst1" = "$lst2" || exit 1671
+test "$lst_ref" = "$lst1" || exit 1672
 
 #[ -f "tmp/klebsiella_100_1.undefined.fq" ] || exit 164
 #[ -f "tmp/klebsiella_100_2.undefined.fq" ] || exit 165