Adding "data cubes" to Quantities tutorial's keywords

kakirastern · kakirastern · commit ff792b275d03 · 2019-02-19T22:30:55.000+08:00
diff --git a/tutorials/notebooks/quantities/quantities.ipynb b/tutorials/notebooks/quantities/quantities.ipynb
@@ -13,7 +13,7 @@
     "* TODO\n",
     "\n",
     "## Keywords\n",
-    "units, matplotlib, radio astronomy\n",
+    "units, matplotlib, radio astronomy, data cubes\n",
     "\n",
     "## Summary\n",
     "\n",
