--- a/src/HOL/Analysis/Integral_Test.thy Fri Apr 12 19:48:29 2019 +0200
+++ b/src/HOL/Analysis/Integral_Test.thy Fri Apr 12 22:09:25 2019 +0200
@@ -19,7 +19,7 @@
\<close>
(* TODO: continuous_in \<rightarrow> integrable_on *)
-locale%important antimono_fun_sum_integral_diff =
+locale\<^marker>\<open>tag important\<close> antimono_fun_sum_integral_diff =
fixes f :: "real \<Rightarrow> real"
assumes dec: "\<And>x y. x \<ge> 0 \<Longrightarrow> x \<le> y \<Longrightarrow> f x \<ge> f y"
assumes nonneg: "\<And>x. x \<ge> 0 \<Longrightarrow> f x \<ge> 0"