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/core/SkCoreBlitters.h b/src/core/SkCoreBlitters.h
index 06e106d..ec9ee20 100644
--- a/src/core/SkCoreBlitters.h
+++ b/src/core/SkCoreBlitters.h
@@ -171,17 +171,17 @@
     void blitRect(int x, int y, int width, int height) override;
     void blitAntiH(int x, int y, const SkAlpha[], const int16_t[]) override;
     void blitMask(const SkMask&, const SkIRect&) override;
-    
+
 private:
     SkXfermode*         fXfermode;
     SkPMColor*          fBuffer;
     SkBlitRow::Proc32   fProc32;
     SkBlitRow::Proc32   fProc32Blend;
     bool                fShadeDirectlyIntoDevice;
-    
+
     // illegal
     SkARGB32_Shader_Blitter& operator=(const SkARGB32_Shader_Blitter&);
-    
+
     typedef SkShaderBlitter INHERITED;
 };