Fix primes bound on shell scripts

bash/soe-bash

@@ -8,6 +8,8 @@ for i in `seq 2 $num`; do
     nums+=($i)
 done
 
+unset nums[-1]
+
 while [ -n "$nums" ]; do
     prime=${nums[0]}
     echo $prime

fish/soe-fish

@@ -3,7 +3,7 @@
 read -P "" num
 echo
 
-set nums (seq 2 $num)
+set nums (seq 2 $num)[..-2]
 
 while test -n "$nums"
     set prime $nums[1]