Fixed frozen string error

[RobertDober]

Ruby 2.7.1 and bundler 2.1.4 here

After a necessary bundle update 2 specs complained - and quite loudly so if I daresay - about

Bundler version 2.1.4
    # ./lib/locomotive/wagon/commands/push_sub_commands/push_theme_assets_command.rb:57:in `gsub!'
     # ./lib/locomotive/wagon/commands/push_sub_commands/push_theme_assets_command.rb:57:in `replace_assets!'
     # ./lib/locomotive/wagon/commands/push_sub_commands/push_theme_assets_command.rb:46:in `block in precompile'
     # ./lib/locomotive/wagon/commands/push_sub_commands/push_theme_assets_command.rb:42:in `tap'
     # ./lib/locomotive/wagon/commands/push_sub_commands/push_theme_assets_command.rb:42:in `precompile'
     # ./lib/locomotive/wagon/commands/push_sub_commands/push_theme_assets_command.rb:21:in `persist'
     # ./lib/locomotive/wagon/commands/push_sub_commands/push_base_command.rb:34:in `block in _push'
     # ./lib/locomotive/wagon/commands/push_sub_commands/push_base_command.rb:30:in `each'
     # ./lib/locomotive/wagon/commands/push_sub_commands/push_base_command.rb:30:in `_push'
     # ./lib/locomotive/wagon/commands/push_sub_commands/push_base_command.rb:25:in `block in _push_with_timezone'
     # /Users/robert/.rvm/gems/ruby-2.7.1/gems/activesupport-5.2.4.4/lib/active_support/core_ext/time/zones.rb:66:in `use_zone'
     # ./lib/locomotive/wagon/commands/push_sub_commands/push_base_command.rb:24:in `_push_with_timezone'
     # ./lib/locomotive/wagon/commands/push_sub_commands/push_base_command.rb:18:in `block in push'
     # /Users/robert/.rvm/gems/ruby-2.7.1/gems/activesupport-5.2.4.4/lib/active_support/notifications.rb:168:in `block in instrument'
     # /Users/robert/.rvm/gems/ruby-2.7.1/gems/activesupport-5.2.4.4/lib/active_support/notifications/instrumenter.rb:23:in `instrument'
     # /Users/robert/.rvm/gems/ruby-2.7.1/gems/activesupport-5.2.4.4/lib/active_support/notifications.rb:168:in `instrument'
     # ./lib/locomotive/wagon/commands/push_sub_commands/push_base_command.rb:50:in `instrument'
     # ./lib/locomotive/wagon/commands/push_sub_commands/push_base_command.rb:16:in `push'
     # ./lib/locomotive/wagon/commands/push_sub_commands/push_base_command.rb:12:in `push'
     # ./lib/locomotive/wagon/commands/push_command.rb:65:in `block in _push'
     # ./lib/locomotive/wagon/commands/push_command.rb:94:in `block in each_resource'
     # ./lib/locomotive/wagon/commands/push_command.rb:87:in `each'
     # ./lib/locomotive/wagon/commands/push_command.rb:87:in `each_resource'
     # ./lib/locomotive/wagon/commands/push_command.rb:64:in `_push'
     # ./lib/locomotive/wagon/commands/push_command.rb:51:in `push'
     # ./spec/integration/commands/push_command_spec.rb:20:in `block (3 levels) in <top (required)>'
     # ./spec/integration/commands/push_command_spec.rb:48:in `block (5 levels) in <top (required)>'

I am aware that this solution might not really address all concerned issues, but at least it will get you informed about the problem.

BTW my goal is to get rid of the Faraday warnings

[RobertDober]

bundler's output (who wants to read Gemfile.lock, right)
bundle.txt