typo fix

MaoXianXin · MaoXianXin · commit b2a252873b37 · 2021-12-23T15:11:09.000+08:00
diff --git a/site/en/tutorials/keras/regression.ipynb b/site/en/tutorials/keras/regression.ipynb
@@ -768,7 +768,7 @@
       },
       "outputs": [],
       "source": [
-        "plot_horsepower(x,y)"
+        "plot_horsepower(x, y)"
       ]
     },
     {
