--- a/src/HOL/Sledgehammer.thy Thu Apr 23 13:49:46 2020 +0200
+++ b/src/HOL/Sledgehammer.thy Thu Apr 23 15:45:42 2020 +0200
@@ -16,6 +16,7 @@
lemma size_ne_size_imp_ne: "size x \<noteq> size y \<Longrightarrow> x \<noteq> y"
by (erule contrapos_nn) (rule arg_cong)
+ML_file \<open>Tools/ATP/atp_systems.ML\<close>
ML_file \<open>Tools/Sledgehammer/async_manager_legacy.ML\<close>
ML_file \<open>Tools/Sledgehammer/sledgehammer_util.ML\<close>
ML_file \<open>Tools/Sledgehammer/sledgehammer_fact.ML\<close>