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Freezolite: the magic gem for keeping Ruby literals safely frozen—Martian Chronicles, Evil Martians' team blog
What is Frozen String Literal and why is it a real thing in Ruby? | Dhaval Singh posted on the topic | LinkedIn
Using frozen_string_literal and unfreezing a string argument results in Ambiguous positive number operator warning · Issue #4630 · rubocop/rubocop · GitHub
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