From f49657d31b0477f02cb367860fd7752a17aa7839 Mon Sep 17 00:00:00 2001
From: Guillaume Lemaitre <g.lemaitre58@gmail.com>
Date: Mon, 3 Feb 2020 11:39:32 +0100
Subject: [PATCH] Backport PR #31571: DOC fix *_option() docstring

---
 pandas/_config/config.py | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/pandas/_config/config.py b/pandas/_config/config.py
index 0a3009f74492f..1978f5066733f 100644
--- a/pandas/_config/config.py
+++ b/pandas/_config/config.py
@@ -144,9 +144,7 @@ def _describe_option(pat="", _print_desc=True):
     if len(keys) == 0:
         raise OptionError("No such keys(s)")
 
-    s = ""
-    for k in keys:  # filter by pat
-        s += _build_option_description(k)
+    s = "\n".join([_build_option_description(k) for k in keys])
 
     if _print_desc:
         print(s)