fixed variance test

Author: gtheler

tests/variance.sh

@@ -22,6 +22,7 @@ if [ ! -e play.txt ]; then
   echo "error: cannot find play.txt"
   exit 1
 fi
+rm -rf report.yaml
 ../../blackjack < play.txt
 
 mean=$(yq .mean report.yaml)

tests/variance/blackjack.conf

@@ -2,6 +2,5 @@ cards_file = cards.txt
 new_hand_reset_cards = false
 quit_when_arranged_cards_run_out = true
 report_file = report.yaml
-
-enhc = true
+rules = enhc
 flat_bet = true