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/tests/ImageCacheTest.cpp b/tests/ImageCacheTest.cpp
index 89d2f8d..c2cf2d9 100644
--- a/tests/ImageCacheTest.cpp
+++ b/tests/ImageCacheTest.cpp
@@ -32,7 +32,7 @@
     static bool Visitor(const SkResourceCache::Rec& baseRec, void* context) {
         const TestingRec& rec = static_cast<const TestingRec&>(baseRec);
         intptr_t* result = (intptr_t*)context;
-        
+
         *result = rec.fValue;
         return true;
     }