[devdocsgjs/main: 1337/1867] Add syntax highlighting to Groovy

[Andy Holmes <andyholmes src gnome org>]

commit 299f24a04902c8f9ec127e3289a90259f9e4743e
Author: Phil Scherer <pnscher evoforge org>
Date:   Fri Dec 4 16:00:36 2020 +0000

    Add syntax highlighting to Groovy

 lib/docs/filters/groovy/clean_html.rb | 4 ++++
 1 file changed, 4 insertions(+)
---
diff --git a/lib/docs/filters/groovy/clean_html.rb b/lib/docs/filters/groovy/clean_html.rb
index c08e8044..baf88527 100755
--- a/lib/docs/filters/groovy/clean_html.rb
+++ b/lib/docs/filters/groovy/clean_html.rb
@@ -86,6 +86,10 @@ module Docs
           node.name = node.name.sub(/\d/) { |i| i.to_i - 1 }
         end
 
+        css('pre').each do |node|
+          node['data-language'] = 'groovy'
+        end
+
         doc
       end
     end