Implement _escape_value.

dulwich/config.py

@@ -110,7 +110,7 @@ def _unescape_value(value):
 
 def _escape_value(value):
     """Escape a value."""
-    return value.replace("\n", "\\n").replace("\t", "\\t").replace("\"", "\\\"").replace("\\", "\\\\")
+    return value.replace("\\", "\\\\").replace("\n", "\\n").replace("\t", "\\t").replace("\"", "\\\"")
 
 
 class ConfigFile(ConfigDict):

dulwich/tests/test_config.py

@@ -84,3 +84,6 @@ class EscapeTests(TestCase):
 
     def test_backslash(self):
         self.assertEquals("foo\\\\", _escape_value("foo\\"))
+
+    def test_newline(self):
+        self.assertEquals("foo\\n", _escape_value("foo\n"))