diff -r 6eb7d95f8970 -r 0f9e52f900c4 hgext/convert/common.py
--- a/hgext/convert/common.py	Sun Feb 11 18:34:22 2018 -0800
+++ b/hgext/convert/common.py	Tue Feb 13 21:52:51 2018 +0900
@@ -476,7 +476,7 @@
                 raise error.Abort(
                     _('could not open map file %r: %s') %
                     (self.path, encoding.strtolocal(err.strerror)))
-        self.fp.write('%s %s\n' % (key, value))
+        self.fp.write(util.tonativeeol('%s %s\n' % (key, value)))
         self.fp.flush()
         super(mapfile, self).__setitem__(key, value)