hgext/convert/subversion.py

--- a/hgext/convert/subversion.py	Sat Mar 10 15:50:09 2018 +0900
+++ b/hgext/convert/subversion.py	Sat Mar 10 15:57:16 2018 +0900
@@ -1310,7 +1310,7 @@
             self.setexec = []
 
         fd, messagefile = tempfile.mkstemp(prefix='hg-convert-')
-        fp = os.fdopen(fd, pycompat.sysstr('wb'))
+        fp = os.fdopen(fd, r'wb')
         fp.write(util.tonativeeol(commit.desc))
         fp.close()
         try: