Merge pull request #10 from emonty/master

Add filenames to upcall errors

diff --cc NEWS
index 954bd8768530bb585f1eebba0649d98e330edf05,925901eaa3f65d7d4450e86af84f7c3c06b6da46..00c49cbb3d29460c487db9ea24f04db88af5cd52
--- 1/NEWS
--- 2/NEWS
+++ b/NEWS
@@@ -10,9 -10,11 +10,12 @@@ Improvement
  ------------
  
  * ``testtools.compat.unicode_output_stream`` was wrapping a stream encoder
 -  around ``io.StringIO`` objects, which was incorrect. (Robert Collins)
 +  around ``io.StringIO`` and ``io.TextIOWrapper`` objects, which was incorrect.
 +  (Robert Collins)
  
+ * Report the name of the source file for setUp and tearDown upcall errors.
+   (Monty Taylor)
+ 
  0.9.28
  ~~~~~~