Style bikeshed - remove extraneous whitespace

GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1842753002

Review URL: https://codereview.chromium.org/1842753002
diff --git a/bench/BlurRectBench.cpp b/bench/BlurRectBench.cpp
index 53cf2da..774bafa 100644
--- a/bench/BlurRectBench.cpp
+++ b/bench/BlurRectBench.cpp
@@ -92,7 +92,7 @@
         SkMask mask;
         if (!SkBlurMask::BlurRect(SkBlurMask::ConvertRadiusToSigma(this->radius()),
                                   &mask, r, kNormal_SkBlurStyle)) {
-            return;    
+            return;
         }
         SkMask::FreeImage(mask.fImage);
     }