--- a/layout/svg/nsSVGMaskFrame.cpp
+++ b/layout/svg/nsSVGMaskFrame.cpp
@@ -202,17 +202,17 @@ NS_IMPL_FRAMEARENA_HELPERS(nsSVGMaskFram
 
 already_AddRefed<SourceSurface>
 nsSVGMaskFrame::GetMaskForMaskedFrame(gfxContext* aContext,
                                       nsIFrame* aMaskedFrame,
                                       const gfxMatrix &aMatrix,
                                       float aOpacity,
                                       Matrix* aMaskTransform,
                                       uint8_t aMaskOp)
-{
+{ 
   // If the flag is set when we get here, it means this mask frame
   // has already been used painting the current mask, and the document
   // has a mask reference loop.
   if (mInUse) {
     NS_WARNING("Mask loop detected!");
     return nullptr;
   }
   AutoMaskReferencer maskRef(this);