From a1a169334fe845744fc78408592aaa27ad8ea376 Mon Sep 17 00:00:00 2001
From: PJ Fanning <fanningpj@apache.org>
Date: Thu, 25 Nov 2021 05:27:51 +0000
Subject: [PATCH] [bug-63211] fix issue with escaped % in custom number format

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1895313 13f79535-47bb-0310-9956-ffa450edef68
---
 .../main/java/org/apache/poi/ss/usermodel/DataFormatter.java | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/poi/src/main/java/org/apache/poi/ss/usermodel/DataFormatter.java b/poi/src/main/java/org/apache/poi/ss/usermodel/DataFormatter.java
index b8bd933a9a..ed3a447aab 100644
--- a/poi/src/main/java/org/apache/poi/ss/usermodel/DataFormatter.java
+++ b/poi/src/main/java/org/apache/poi/ss/usermodel/DataFormatter.java
@@ -606,7 +606,10 @@ public class DataFormatter {
 
     }
 
-    private String cleanFormatForNumber(String formatStr) {
+    private String cleanFormatForNumber(String formatStrIn) {
+        // this replace is done to fix https://bz.apache.org/bugzilla/show_bug.cgi?id=63211
+        String formatStr = formatStrIn.replace("\\%", "\'%\'");
+
         StringBuilder sb = new StringBuilder(formatStr);
 
         if (emulateCSV) {