DOC: Add back currentmodule to api.rst (pandas-dev#24232)

jorisvandenbossche · Pingviinituutti · commit df97197f7a0e · 2019-02-28T10:19:13.000+02:00
diff --git a/doc/source/api.rst b/doc/source/api.rst
@@ -1,3 +1,9 @@
+.. The currentmodule is needed here because the autosummary generation of files
+.. happens before reading the files / substituting the header.
+.. See https://github.com/pandas-dev/pandas/pull/24232
+
+.. currentmodule:: pandas
+
 .. _api:
 
 {{ header }}
