DOC: fix error in documentation pandas-dev#24981 (pandas-dev#25038)

johnnychiuchiu · jreback · commit 515b0fa77e78 · 2019-01-30T16:56:43.000-05:00
diff --git a/doc/source/user_guide/groupby.rst b/doc/source/user_guide/groupby.rst
@@ -15,7 +15,7 @@ steps:
 
 Out of these, the split step is the most straightforward. In fact, in many
 situations we may wish to split the data set into groups and do something with
-those groups. In the apply step, we might wish to one of the
+those groups. In the apply step, we might wish to do one of the
 following:
 
 * **Aggregation**: compute a summary statistic (or statistics) for each
