--- a/Plugins/VcsPlugins/vcsMercurial/HgDiffDialog.py	Fri Apr 12 17:30:32 2013 +0200
+++ b/Plugins/VcsPlugins/vcsMercurial/HgDiffDialog.py	Fri Apr 12 21:04:00 2013 +0200
@@ -430,7 +430,7 @@
         
         eol = e5App().getObject("Project").getEolString()
         try:
-            f = open(fname, "w", encoding="utf-8", newline="")
+            f = open(fname, "w", encoding="utf-8")
             f.write(eol.join(self.contents.toPlainText().splitlines()))
             f.close()
         except IOError as why: