From f2095f1d5bb23bdac46eb14492e5b5f31622613a Mon Sep 17 00:00:00 2001
From: Philip Hyunsu Cho <chohyu01@cs.washington.edu>
Date: Sun, 4 Feb 2024 00:23:35 -0800
Subject: [PATCH] [Doc] Fix formatting for R package doc (#10030)

---
 doc/R-package/index.rst |  1 +
 doc/requirements.txt    |  2 ++
 doc/xgboost_doc.yml     | 10 +++++++++-
 3 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/doc/R-package/index.rst b/doc/R-package/index.rst
index 8a27d0174..bf9c1f8d9 100644
--- a/doc/R-package/index.rst
+++ b/doc/R-package/index.rst
@@ -34,4 +34,5 @@ Other topics
 .. toctree::
   :maxdepth: 2
   :titlesonly:
+
   Handling of indexable elements <index_base>
diff --git a/doc/requirements.txt b/doc/requirements.txt
index 667ef268f..ddff9be92 100644
--- a/doc/requirements.txt
+++ b/doc/requirements.txt
@@ -7,7 +7,9 @@ sh
 matplotlib
 graphviz
 numpy
+scipy
 myst-parser
+ray[train]
 xgboost_ray
 sphinx-gallery
 pyspark
diff --git a/doc/xgboost_doc.yml b/doc/xgboost_doc.yml
index 90b877e73..177e8758f 100644
--- a/doc/xgboost_doc.yml
+++ b/doc/xgboost_doc.yml
@@ -1,15 +1,23 @@
 name: xgboost_docs
 dependencies:
-  - python
+  - python=3.10
   - pip
   - pygraphviz
   - sphinx
+  - sphinx-gallery
   - recommonmark
   - mock
   - sh
   - matplotlib
+  - numpy
+  - scipy
+  - scikit-learn
+  - myst-parser
+  - pyspark
   - pip:
     - breathe
     - sphinx_rtd_theme
     - pydot-ng
     - graphviz
+    - ray[train]
+    - xgboost_ray