STYLE: Fix typo in GetFilenameLastExtension docs
STYLE: Fix typo in GetFilenameLastExtension docs

See issue #7797.

msmolens/ITK,spinicist/ITK,wkjeong/ITK,cpatrick/ITK-RemoteIO,msmolens/ITK,vfonov/ITK,fedral/ITK,CapeDrew/DCMTK-ITK,wkjeong/ITK,biotrump/ITK,ajjl/ITK,LucasGandel/ITK,itkvideo/ITK,biotrump/ITK,hinerm/ITK,itkvideo/ITK,cpatrick/ITK-RemoteIO,daviddoria/itkHoughTransform,wkjeong/ITK,richardbeare/ITK,daviddoria/itkHoughTransform,heimdali/ITK,biotrump/ITK,stnava/ITK,cpatrick/ITK-RemoteIO,CapeDrew/DCMTK-ITK,fuentesdt/InsightToolkit-dev,fbudin69500/ITK,spinicist/ITK,rhgong/itk-with-dom,CapeDrew/DITK,jmerkow/ITK,hinerm/ITK,rhgong/itk-with-dom,malaterre/ITK,fedral/ITK,jmerkow/ITK,PlutoniumHeart/ITK,itkvideo/ITK,LucasGandel/ITK,PlutoniumHeart/ITK,PlutoniumHeart/ITK,thewtex/ITK,itkvideo/ITK,hendradarwin/ITK,GEHC-Surgery/ITK,CapeDrew/DITK,LucasGandel/ITK,LucHermitte/ITK,hjmjohnson/ITK,eile/ITK,zachary-williamson/ITK,CapeDrew/DITK,InsightSoftwareConsortium/ITK,heimdali/ITK,hjmjohnson/ITK,jcfr/ITK,thewtex/ITK,jmerkow/ITK,ajjl/ITK,jcfr/ITK,fbudin69500/ITK,paulnovo/ITK,rhgong/itk-with-dom,InsightSoftwareConsortium/ITK,spinicist/ITK,BlueBrain/ITK,hendradarwin/ITK,eile/ITK,spinicist/ITK,jcfr/ITK,vfonov/ITK,rhgong/itk-with-dom,LucHermitte/ITK,BRAINSia/ITK,atsnyder/ITK,zachary-williamson/ITK,CapeDrew/DCMTK-ITK,fbudin69500/ITK,fbudin69500/ITK,paulnovo/ITK,atsnyder/ITK,heimdali/ITK,stnava/ITK,GEHC-Surgery/ITK,fbudin69500/ITK,spinicist/ITK,fuentesdt/InsightToolkit-dev,CapeDrew/DCMTK-ITK,LucasGandel/ITK,thewtex/ITK,Kitware/ITK,rhgong/itk-with-dom,hinerm/ITK,hendradarwin/ITK,Kitware/ITK,msmolens/ITK,fbudin69500/ITK,hendradarwin/ITK,malaterre/ITK,jcfr/ITK,richardbeare/ITK,malaterre/ITK,atsnyder/ITK,paulnovo/ITK,CapeDrew/DITK,zachary-williamson/ITK,atsnyder/ITK,richardbeare/ITK,fedral/ITK,zachary-williamson/ITK,msmolens/ITK,fuentesdt/InsightToolkit-dev,blowekamp/ITK,PlutoniumHeart/ITK,InsightSoftwareConsortium/ITK,msmolens/ITK,eile/ITK,fedral/ITK,thewtex/ITK,eile/ITK,CapeDrew/DITK,stnava/ITK,vfonov/ITK,vfonov/ITK,daviddoria/itkHoughTransform,BlueBrain/ITK,itkvideo/ITK,vfonov/ITK,blowekamp/ITK,hendradarwin/ITK,malaterre/ITK,InsightSoftwareConsortium/ITK,msmolens/ITK,zachary-williamson/ITK,CapeDrew/DITK,BRAINSia/ITK,hendradarwin/ITK,daviddoria/itkHoughTransform,thewtex/ITK,daviddoria/itkHoughTransform,LucHermitte/ITK,zachary-williamson/ITK,fuentesdt/InsightToolkit-dev,BRAINSia/ITK,wkjeong/ITK,BlueBrain/ITK,msmolens/ITK,daviddoria/itkHoughTransform,GEHC-Surgery/ITK,thewtex/ITK,ajjl/ITK,blowekamp/ITK,spinicist/ITK,wkjeong/ITK,atsnyder/ITK,heimdali/ITK,zachary-williamson/ITK,ajjl/ITK,paulnovo/ITK,GEHC-Surgery/ITK,blowekamp/ITK,spinicist/ITK,hjmjohnson/ITK,CapeDrew/DCMTK-ITK,jmerkow/ITK,BlueBrain/ITK,hjmjohnson/ITK,ajjl/ITK,malaterre/ITK,richardbeare/ITK,GEHC-Surgery/ITK,daviddoria/itkHoughTransform,jcfr/ITK,hinerm/ITK,jmerkow/ITK,paulnovo/ITK,fuentesdt/InsightToolkit-dev,malaterre/ITK,malaterre/ITK,BRAINSia/ITK,jmerkow/ITK,stnava/ITK,richardbeare/ITK,PlutoniumHeart/ITK,vfonov/ITK,GEHC-Surgery/ITK,heimdali/ITK,eile/ITK,CapeDrew/DCMTK-ITK,Kitware/ITK,richardbeare/ITK,stnava/ITK,atsnyder/ITK,blowekamp/ITK,LucasGandel/ITK,biotrump/ITK,jmerkow/ITK,InsightSoftwareConsortium/ITK,hinerm/ITK,paulnovo/ITK,BRAINSia/ITK,daviddoria/itkHoughTransform,atsnyder/ITK,vfonov/ITK,Kitware/ITK,jmerkow/ITK,itkvideo/ITK,fuentesdt/InsightToolkit-dev,GEHC-Surgery/ITK,zachary-williamson/ITK,hendradarwin/ITK,InsightSoftwareConsortium/ITK,hinerm/ITK,blowekamp/ITK,cpatrick/ITK-RemoteIO,BlueBrain/ITK,hinerm/ITK,msmolens/ITK,spinicist/ITK,malaterre/ITK,Kitware/ITK,eile/ITK,fedral/ITK,wkjeong/ITK,fedral/ITK,ajjl/ITK,rhgong/itk-with-dom,atsnyder/ITK,jcfr/ITK,fuentesdt/InsightToolkit-dev,paulnovo/ITK,rhgong/itk-with-dom,hjmjohnson/ITK,PlutoniumHeart/ITK,CapeDrew/DITK,heimdali/ITK,PlutoniumHeart/ITK,Kitware/ITK,LucasGandel/ITK,cpatrick/ITK-RemoteIO,wkjeong/ITK,CapeDrew/DCMTK-ITK,LucHermitte/ITK,LucHermitte/ITK,heimdali/ITK,PlutoniumHeart/ITK,daviddoria/itkHoughTransform,biotrump/ITK,cpatrick/ITK-RemoteIO,CapeDrew/DCMTK-ITK,eile/ITK,spinicist/ITK,wkjeong/ITK,BlueBrain/ITK,stnava/ITK,hinerm/ITK,cpatrick/ITK-RemoteIO,itkvideo/ITK,itkvideo/ITK,fedral/ITK,cpatrick/ITK-RemoteIO,hjmjohnson/ITK,ajjl/ITK,fedral/ITK,LucHermitte/ITK,fuentesdt/InsightToolkit-dev,malaterre/ITK,zachary-williamson/ITK,stnava/ITK,GEHC-Surgery/ITK,BlueBrain/ITK,stnava/ITK,CapeDrew/DITK,jcfr/ITK,hinerm/ITK,BlueBrain/ITK,eile/ITK,eile/ITK,hjmjohnson/ITK,fbudin69500/ITK,vfonov/ITK,vfonov/ITK,atsnyder/ITK,LucHermitte/ITK,Kitware/ITK,ajjl/ITK,CapeDrew/DITK,CapeDrew/DCMTK-ITK,biotrump/ITK,stnava/ITK,fbudin69500/ITK,LucasGandel/ITK,BRAINSia/ITK,jcfr/ITK,InsightSoftwareConsortium/ITK,richardbeare/ITK,blowekamp/ITK,thewtex/ITK,rhgong/itk-with-dom,BRAINSia/ITK,blowekamp/ITK,heimdali/ITK,LucHermitte/ITK,biotrump/ITK,fuentesdt/InsightToolkit-dev,hendradarwin/ITK,LucasGandel/ITK,biotrump/ITK,itkvideo/ITK,paulnovo/ITK