From 341986c03a42f879c9ffe33e6a1ebd305170851d Mon Sep 17 00:00:00 2001
From: Takeshi KOMIYA <i.tkomiya@gmail.com>
Date: Sat, 25 Feb 2017 14:45:49 +0900
Subject: [PATCH] Fix #3453: remove doc/_build/ forcely on `make clean` on
 Sphinx repos

---
 Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Makefile b/Makefile
index 0b1a43435..101cfca2c 100644
--- a/Makefile
+++ b/Makefile
@@ -56,7 +56,7 @@ clean-backupfiles:
 
 clean-generated:
 	find . -name '.DS_Store' -exec rm -f {} +
-	rm -f doc/_build/
+	rm -rf doc/_build/
 	rm -f sphinx/pycode/*.pickle
 	rm -f utils/*3.py*
 	rm -f utils/regression_test.js