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-rw-r--r--lib/axlsx/drawing/axis.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/axlsx/drawing/axis.rb b/lib/axlsx/drawing/axis.rb
index ea093391..9d6a54c6 100644
--- a/lib/axlsx/drawing/axis.rb
+++ b/lib/axlsx/drawing/axis.rb
@@ -120,7 +120,7 @@ module Axlsx
str << '<c:minorTickMark val="none"/>'
str << '<c:tickLblPos val="' << @tickLblPos.to_s << '"/>'
# some potential value in implementing this in full. Very detailed!
- str << "<c:txPr><a:bodyPr rot='#{@label_rotation}'/><a:lstStyle/><a:p><a:pPr><a:defRPr/></a:pPr><a:endParaRPr/></a:p></c:txPr>"
+ str << '<c:txPr><a:bodyPr rot="' << @label_rotation.to_s << '"/><a:lstStyle/><a:p><a:pPr><a:defRPr/></a:pPr><a:endParaRPr/></a:p></c:txPr>'
str << '<c:crossAx val="' << @crossAx.to_s << '"/>'
str << '<c:crosses val="' << @crosses.to_s << '"/>'
end