src/HOL/Library/document/root.tex

--- a/src/HOL/Library/document/root.tex	Tue Mar 09 20:00:44 2021 +0100
+++ b/src/HOL/Library/document/root.tex	Tue Mar 09 21:11:05 2021 +0100
@@ -1,6 +1,6 @@
 \documentclass[11pt,a4paper]{article}
+\usepackage[T1]{fontenc}
 \usepackage{ifthen}
-\usepackage[utf8]{inputenc}
 \usepackage[english]{babel}
 \usepackage{amsmath,amssymb,stmaryrd,textcomp,wasysym}
 \usepackage{isabelle,isabellesym}