Append in place for strings and arrays

app/controllers/projects/refs_controller.rb

app/helpers/commits_helper.rb

app/helpers/graph_helper.rb

app/helpers/projects_helper.rb

app/helpers/tags_helper.rb

app/helpers/tree_helper.rb

app/models/ability.rb

app/models/concerns/mentionable.rb

app/models/merge_request.rb

app/models/network/graph.rb

app/models/project.rb

app/models/project_team.rb

app/models/user.rb

config/application.rb