try

patchfile.gemspec

@@ -46,6 +46,7 @@ all_template.each do |folder|
             f.write new_texts
           end
         elsif texts_html.css('.site-title >a').length == 1 && texts_html.css('.navbar-brand').length == 0
+          puts texts
           new_texts = texts.gsub(texts_html.css('.site-title >a').to_s.gsub("%7B",'{').gsub('%7D','}'),change_text)
           File.open(filename,'w') do |f|
             f.write new_texts