--- a/mercurial/patch.py	Mon Jun 15 02:51:10 2009 -0500
+++ b/mercurial/patch.py	Tue Jun 16 16:22:42 2009 +0100
@@ -299,7 +299,7 @@
             if self.eol and self.eol != '\n':
                 for l in lines:
                     if l and l[-1] == '\n':
-                        l = l[:1] + self.eol
+                        l = l[:-1] + self.eol
                     fp.write(l)
             else:
                 fp.writelines(lines)