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-rw-r--r--lib/puppet/parser/functions/swapcase.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/puppet/parser/functions/swapcase.rb b/lib/puppet/parser/functions/swapcase.rb
index 8158f3c..f3276fb 100644
--- a/lib/puppet/parser/functions/swapcase.rb
+++ b/lib/puppet/parser/functions/swapcase.rb
@@ -1,5 +1,6 @@
#
# swapcase.rb
+# Please note: This function is an implementation of a Ruby class and as such may not be entirely UTF8 compatible. To ensure compatibility please use this function with Ruby 2.4.0 or greater - https://bugs.ruby-lang.org/issues/10085.
#
module Puppet::Parser::Functions