Somewhere along the way, the softspace attr of file objects became read-
only.  Repaired, and added new tests to test_file.py.
diff --git a/Misc/NEWS b/Misc/NEWS
index 05c9ce2..3ff9a64 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -12,6 +12,9 @@
 Core and builtins
 -----------------
 
+- The softspace attribute of file objects became read-only by oversight.
+  It's writable again.
+
 Extension modules
 -----------------