Move htmlsanitizer trim both sides method to the core #77
Description
Add this method https://github.com/learningtapestry/odell-lcms/blob/master/app/services/html_sanitizer.rb#L31 to the core, remove from lcms-engine consumers.
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Add this method https://github.com/learningtapestry/odell-lcms/blob/master/app/services/html_sanitizer.rb#L31 to the core, remove from lcms-engine consumers.