Do not encode CSV outro output comment.

doc/changelog.txt

@@ -10,6 +10,8 @@ Fixes:
   Closes: SF bug #3515959
 - i18n: Make locale domain name lowercase, fixing the .mo-file
   lookup on Unix systems.
+- checking: Fix CSV output with German locale.
+  Closes: SF bug #3516400
 
 Features:
 - cgi: Added a WSGI script to replace the CGI script.

linkcheck/logger/csvlog.py

@@ -49,7 +49,7 @@ class CSVLogger (Logger):
 
     def comment (self, s, **args):
         """Write CSV comment."""
-        self.writeln(s=self.encode(u"# %s" % s), **args)
+        self.writeln(s=u"# %s" % s, **args)
 
     def start_output (self):
         """Write checking start info as csv comment."""