Fix docstring typo
Fix docstring typo

andrsd/moose,sapitts/moose,harterj/moose,laagesen/moose,milljm/moose,milljm/moose,dschwen/moose,idaholab/moose,sapitts/moose,bwspenc/moose,sapitts/moose,YaqiWang/moose,harterj/moose,YaqiWang/moose,laagesen/moose,milljm/moose,permcody/moose,SudiptaBiswas/moose,milljm/moose,SudiptaBiswas/moose,jessecarterMOOSE/moose,SudiptaBiswas/moose,nuclear-wizard/moose,bwspenc/moose,andrsd/moose,laagesen/moose,dschwen/moose,lindsayad/moose,nuclear-wizard/moose,YaqiWang/moose,permcody/moose,nuclear-wizard/moose,idaholab/moose,harterj/moose,laagesen/moose,jessecarterMOOSE/moose,jessecarterMOOSE/moose,lindsayad/moose,bwspenc/moose,jessecarterMOOSE/moose,idaholab/moose,bwspenc/moose,dschwen/moose,idaholab/moose,sapitts/moose,sapitts/moose,lindsayad/moose,YaqiWang/moose,andrsd/moose,andrsd/moose,permcody/moose,lindsayad/moose,idaholab/moose,nuclear-wizard/moose,milljm/moose,permcody/moose,dschwen/moose,harterj/moose,bwspenc/moose,andrsd/moose,SudiptaBiswas/moose,SudiptaBiswas/moose,lindsayad/moose,dschwen/moose,jessecarterMOOSE/moose,harterj/moose,laagesen/moose