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/gm/shallowgradient.cpp b/gm/shallowgradient.cpp
index 6990ba7..ad1de63 100644
--- a/gm/shallowgradient.cpp
+++ b/gm/shallowgradient.cpp
@@ -50,7 +50,7 @@
     }
 
     void onDraw(SkCanvas* canvas) override {
-        const SkColor colors[] = { sk_tool_utils::color_to_565(0xFF555555), 
+        const SkColor colors[] = { sk_tool_utils::color_to_565(0xFF555555),
                 sk_tool_utils::color_to_565(0xFF444444) };
         const int colorCount = SK_ARRAY_COUNT(colors);