From 31a4e6cb13d139c7d54038ecb204b4ae1b152c61 Mon Sep 17 00:00:00 2001
From: Evan Hallmark <ehallmark@gttgrp.com>
Date: Mon, 7 Nov 2016 11:19:12 -0800
Subject: Override NumFmt serialized_attributes to ovid removing underscores

---
 lib/axlsx/stylesheet/num_fmt.rb | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/lib/axlsx/stylesheet/num_fmt.rb b/lib/axlsx/stylesheet/num_fmt.rb
index 8276ba18..1072d18a 100644
--- a/lib/axlsx/stylesheet/num_fmt.rb
+++ b/lib/axlsx/stylesheet/num_fmt.rb
@@ -73,5 +73,14 @@ module Axlsx
       serialized_tag('numFmt', str)
     end
 
+    # Override to avoid removing underscores
+    def serialized_attributes(str = '', additional_attributes = {})
+      attributes = declared_attributes.merge! additional_attributes
+      attributes.each do |key, value|
+        str << "#{Axlsx.camel(key, false)}=\"#{Axlsx.booleanize(value)}\" "
+      end
+      str
+    end
+
   end
 end
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