removed mult_Bit1 from int_arith_rules (cf. 882403378a41 and 3078fd2eec7b, where mult_num1 erroneously replaced mult_1)
--- a/src/HOL/Int.thy Thu Oct 20 10:44:00 2011 +0200
+++ b/src/HOL/Int.thy Thu Oct 20 17:27:14 2011 +0200
@@ -1543,7 +1543,7 @@
lemmas int_arith_rules =
neg_le_iff_le numeral_0_eq_0 numeral_1_eq_1
minus_zero diff_minus left_minus right_minus
- mult_zero_left mult_zero_right mult_Bit1 mult_1_left mult_1_right
+ mult_zero_left mult_zero_right mult_1_left mult_1_right
mult_minus_left mult_minus_right
minus_add_distrib minus_minus mult_assoc
of_nat_0 of_nat_1 of_nat_Suc of_nat_add of_nat_mult