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/circularclips.cpp b/gm/circularclips.cpp
index 15f583f..2691971 100644
--- a/gm/circularclips.cpp
+++ b/gm/circularclips.cpp
@@ -60,7 +60,7 @@
         canvas->drawRect(rect, fillPaint);
 
         canvas->restore();
-      
+
         fillPaint.setColor(0xFF000000);
 
         for (size_t i = 0; i < 4; i++) {