Bug #1379994: Fix *unicode_escape codecs to encode r'\' as r'\\'
just like string codecs.
diff --git a/Objects/unicodeobject.c b/Objects/unicodeobject.c
index 9e5e3b4..b850559 100644
--- a/Objects/unicodeobject.c
+++ b/Objects/unicodeobject.c
@@ -1989,9 +1989,9 @@
     while (size-- > 0) {
         Py_UNICODE ch = *s++;
 
-        /* Escape quotes */
-        if (quotes &&
-	    (ch == (Py_UNICODE) PyString_AS_STRING(repr)[1] || ch == '\\')) {
+        /* Escape quotes and backslashes */
+        if ((quotes &&
+	     ch == (Py_UNICODE) PyString_AS_STRING(repr)[1]) || ch == '\\') {
             *p++ = '\\';
             *p++ = (char) ch;
 	    continue;