Fix: handle deprecation warning - add unary operator to mutable string #351
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This avoids deprecation warnings when running against ruby 3.4.1 and prepares for later versions (4.0) that will default to `# frozen_string_literal: true`. Deprecation warning: ```sh gems/puffing-billy-4.0.0/lib/billy/proxy_connection.rb:33: warning: literal string will be frozen in the future (run with --debug-frozen-string-literal for more information) ``` Example CI with deprecation warnings: https://app.circleci.com/pipelines/github/ministryofjustice/laa-apply-for-legal-aid/32282/workflows/b137f673-cb4e-4f21-a307-86050bde6e87/jobs/168908/parallel-runs/0?filterBy=ALL
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Add unary operator to mutable string.
This avoids deprecation warnings when running against ruby 3.4.1 and prepares for later versions (4.0) that will default to
# frozen_string_literal: true.Deprecation warning:
Example CI with deprecation warnings:
https://app.circleci.com/pipelines/github/ministryofjustice/laa-apply-for-legal-aid/32282/workflows/b137f673-cb4e-4f21-a307-86050bde6e87/jobs/168908/parallel-runs/0?filterBy=ALL