Ruby 4.0 on Windows: Day 0 - install and Hello World

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Ruby is a dynamic, open source programming language with a focus on simplicity and productivity. It has an elegant syntax that is natural to read and easy to write (from the Ruby web site). On Christmas Day 2025, as is tradition now, the core team released version 4.0 the next major version with ZJIT (not available on Windows yet) and experimental support for Ruby Box alongside other improvements…

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