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/pixelsnap.cpp b/gm/pixelsnap.cpp
index 7791acb..1711f5e 100644
--- a/gm/pixelsnap.cpp
+++ b/gm/pixelsnap.cpp
@@ -36,7 +36,7 @@
         SkPaint bgPaint;
         bgPaint.setShader(
                 sk_tool_utils::create_checkerboard_shader(
-                sk_tool_utils::color_to_565(0xFFAAAAAA), 
+                sk_tool_utils::color_to_565(0xFFAAAAAA),
                 sk_tool_utils::color_to_565(0xFF777777), 1));
         canvas->drawPaint(bgPaint);