Fix spelling error in XMLDiffer.py
Fix spelling error in XMLDiffer.py

Chuban/moose,SudiptaBiswas/moose,laagesen/moose,yipenggao/moose,jhbradley/moose,katyhuff/moose,jessecarterMOOSE/moose,nuclear-wizard/moose,milljm/moose,idaholab/moose,stimpsonsg/moose,friedmud/moose,bwspenc/moose,SudiptaBiswas/moose,liuwenf/moose,friedmud/moose,jessecarterMOOSE/moose,nuclear-wizard/moose,sapitts/moose,laagesen/moose,andrsd/moose,idaholab/moose,liuwenf/moose,jasondhales/moose,katyhuff/moose,bwspenc/moose,harterj/moose,lindsayad/moose,stimpsonsg/moose,laagesen/moose,Chuban/moose,lindsayad/moose,jasondhales/moose,nuclear-wizard/moose,joshua-cogliati-inl/moose,jessecarterMOOSE/moose,SudiptaBiswas/moose,laagesen/moose,permcody/moose,yipenggao/moose,dschwen/moose,friedmud/moose,joshua-cogliati-inl/moose,milljm/moose,permcody/moose,harterj/moose,idaholab/moose,stimpsonsg/moose,YaqiWang/moose,harterj/moose,jhbradley/moose,liuwenf/moose,katyhuff/moose,lindsayad/moose,Chuban/moose,sapitts/moose,idaholab/moose,andrsd/moose,jessecarterMOOSE/moose,SudiptaBiswas/moose,liuwenf/moose,permcody/moose,milljm/moose,lindsayad/moose,laagesen/moose,YaqiWang/moose,katyhuff/moose,dschwen/moose,yipenggao/moose,joshua-cogliati-inl/moose,sapitts/moose,permcody/moose,jessecarterMOOSE/moose,backmari/moose,harterj/moose,andrsd/moose,YaqiWang/moose,yipenggao/moose,andrsd/moose,bwspenc/moose,dschwen/moose,joshua-cogliati-inl/moose,jasondhales/moose,bwspenc/moose,stimpsonsg/moose,dschwen/moose,backmari/moose,nuclear-wizard/moose,jhbradley/moose,milljm/moose,harterj/moose,friedmud/moose,liuwenf/moose,idaholab/moose,lindsayad/moose,bwspenc/moose,backmari/moose,Chuban/moose,jhbradley/moose,backmari/moose,sapitts/moose,liuwenf/moose,dschwen/moose,YaqiWang/moose,andrsd/moose,SudiptaBiswas/moose,sapitts/moose,jasondhales/moose,milljm/moose