[svn r51292] Just another except, in order to represent source when it's not there.

--HG--
branch : trunk

py/test/representation.py

@@ -72,7 +72,10 @@ class Presenter(object):
         except KeyboardInterrupt: 
             raise 
         except:
-            s = str(source[-1])
+            try:
+                s = str(source[-1])
+            except IndexError:
+                s = "<Cannot get source>"
         indent = " " * (4 + (len(s) - len(s.lstrip())))
         # get the real exception information out 
         lines = excinfo.exconly(tryshort=True).split('\n')