When where contains values with underscores, those will be incorrectly changed when calling to_param

[mentalic]

For example, when searching for items with where
(where: ["Code.ToUpper() == "ITEM_WITH_UNDERSCORE""])
will be changed to ITEMWITHUNDERSCORE

xero-ruby/lib/xero-ruby/api_client.rb

Line 666 in 53f0118

Where.new(where_opts).to_param