Fixing typo that crept into r34001:3706ff210fec (D5468). Tested by manually raising an exception and making sure that the exception was able to resolve.
Fixing typo that crept into r34001:3706ff210fec (D5468). Tested by manually raising an exception and making sure that the exception was able to resolve.

pyxl4/pyxl4,lez/pyxl3,dropbox/pyxl,wfxiang08/pyxl