Correct a markup error for an accented character.
Reported by Milan Zamazal <pdm@zamazal.org>.
diff --git a/Doc/lib/libweakref.tex b/Doc/lib/libweakref.tex
index 0d92ea9..9062816 100644
--- a/Doc/lib/libweakref.tex
+++ b/Doc/lib/libweakref.tex
@@ -5,7 +5,7 @@
\modulesynopsis{Support for weak references and weak dictionaries.}
\moduleauthor{Fred L. Drake, Jr.}{fdrake@acm.org}
\moduleauthor{Neil Schemenauer}{nas@arctrix.com}
-\moduleauthor{Martin von L\o"wis}{martin@loewis.home.cs.tu-berlin.de}
+\moduleauthor{Martin von L\"owis}{martin@loewis.home.cs.tu-berlin.de}
\sectionauthor{Fred L. Drake, Jr.}{fdrake@acm.org}
\versionadded{2.1}