GEM remote: https://rubygems.org/ specs: activesupport (5.2.0) concurrent-ruby (~> 1.0, >= 1.0.2) i18n (>= 0.7, < 2) minitest (~> 5.1) tzinfo (~> 1.1) addressable (2.5.2) public_suffix (>= 2.0.2, < 4.0) colorize (0.8.1) concurrent-ruby (1.0.5) ethon (0.11.0) ffi (>= 1.3.0) ffi (1.9.23) html-proofer (3.8.0) activesupport (>= 4.2, < 6.0) addressable (~> 2.3) colorize (~> 0.8) mercenary (~> 0.3.2) nokogiri (~> 1.8.1) parallel (~> 1.3) typhoeus (~> 1.3) yell (~> 2.0) i18n (1.0.1) concurrent-ruby (~> 1.0) mercenary (0.3.6) mini_portile2 (2.3.0) minitest (5.11.3) nokogiri (1.8.2) mini_portile2 (~> 2.3.0) parallel (1.12.1) public_suffix (3.0.2) thread_safe (0.3.6) typhoeus (1.3.0) ethon (>= 0.9.0) tzinfo (1.2.5) thread_safe (~> 0.1) yell (2.0.7) PLATFORMS ruby DEPENDENCIES html-proofer BUNDLED WITH 1.14.6