deal with 'set -C'. closes #16

z.sh

@@ -54,7 +54,7 @@ z() {
      for( i in rank ) print i "|" 0.9*rank[i] "|" time[i] # aging
     } else for( i in rank ) print i "|" rank[i] "|" time[i]
    }
-  ' "$datafile" 2>/dev/null > "$tempfile"
+  ' "$datafile" 2>/dev/null >| "$tempfile"
   env mv -f "$tempfile" "$datafile"
 
  # tab completion