[DRE-maint] Bug#892457: ruby-jquery-ui-rails FTBFS with Ruby 2.5

[Adrian Bunk]

Source: ruby-jquery-ui-rails
Version: 6.0.1+dfsg-2
Severity: serious
Tags: buster sid

https://tests.reproducible-builds.org/debian/rb-pkg/unstable/amd64/ruby-jquery-ui-rails.html

...
   dh_ruby --build
ln -s /usr/lib/nodejs/jquery-ui .
rake
rake aborted!
SyntaxError: /build/1st/ruby-jquery-ui-rails-6.0.1+dfsg/Rakefile:34: unmatched range specifier in char-class: /define\(\s*\[\s*([\"\.\/\,\w\s-\:]+)\]/m

(See full trace by running task with --trace)
make[1]: *** [debian/rules:20: override_dh_auto_build] Error 1