BUG 0 is an invalid number of job repetitions

bin/submitjob

@@ -160,7 +160,7 @@ prepare_jobs() {
     while read -r line; do
         if [[ $line = \@* ]]; then
             # Lines starting with @n are multiplied n times
-            pattern='^@([0-9]+) *(.*)$'
+            pattern='^@([1-9][0-9]*) *(.*)$'
             [[ $line =~ $pattern ]] || invalid_pattern "$line"
             num=${BASH_REMATCH[1]}
             cmd=${BASH_REMATCH[2]}