We noticed a formatting difference for regex between rubocop and syntax_tree, which causes back-and-forth changes between the two tools.

For example, this is what the code looks like when formatted byrubocop:

let(:gotcha_with_check_deleted_lines)do{text:'Couchbase model gotcha',file_regexp:%r{^app/models/.*\.rb},keywords:[/ attribute :/],check_deleted_lines:true,}

And this is what it looks like when formatted bysyntax_tree:

let(:gotcha_with_check_deleted_lines)do{text:'Couchbase model gotcha',file_regexp:%r{^app/models/.*\.rb},keywords:[%r{ attribute :}],check_deleted_lines:true,}

Therefore, I propose disablingStyle/RegexpLiteral inconfig/rubocop.yml and lettingsyntax_tree handle regex formatting.