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/src/gpu/GrXferProcessor.cpp b/src/gpu/GrXferProcessor.cpp
index 01534a3..3e2ffaa 100644
--- a/src/gpu/GrXferProcessor.cpp
+++ b/src/gpu/GrXferProcessor.cpp
@@ -201,10 +201,10 @@
         if (!caps.shaderCaps()->dstReadInShaderSupport()) {
             SkASSERT(dstTexture && dstTexture->texture());
         } else {
-            SkASSERT(!dstTexture || !dstTexture->texture()); 
+            SkASSERT(!dstTexture || !dstTexture->texture());
         }
     } else {
-        SkASSERT(!dstTexture || !dstTexture->texture()); 
+        SkASSERT(!dstTexture || !dstTexture->texture());
     }
     SkASSERT(!hasMixedSamples || caps.shaderCaps()->dualSourceBlendingSupport());
 #endif