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-rw-r--r--lib/axlsx/stylesheet/dxf.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/axlsx/stylesheet/dxf.rb b/lib/axlsx/stylesheet/dxf.rb
index 8c32a75f..2c10443a 100644
--- a/lib/axlsx/stylesheet/dxf.rb
+++ b/lib/axlsx/stylesheet/dxf.rb
@@ -8,7 +8,7 @@ module Axlsx
# The order in which the child elements is put in the XML seems to
# be important for Excel
- CHILD_ELEMENTS = [:font, :numFmt, :fill, :alignment, :border, :protection]
+ CHILD_ELEMENTS = [:font, :numFmt, :fill, :alignment, :border, :protection].freeze
# does not support extList (ExtensionList)
# The cell alignment for this style