Merge topic 'enable_language-deduplicate' e3c8012ccd Help: Document enable_language accepting multiple languages b4fd385c9b cmMakefile: Dedupe languages when enabling them 66bfe14309 cmMakefile: Refactor parameter and variable names for EnableLanguage Acked-by: Kitware Robot <kwrobot@kitware.com> Acked-by: buildbot <buildbot@kitware.com> Merge-request: !7426