Contributed to the elixir-lang/elixir repository by enhancing the documentation for RuntimeError, focusing on clarifying pluralization and improving the accuracy of error messaging. The work centered on refining how error semantics are communicated, reducing ambiguity for both developers and users. Using Elixir and leveraging strong documentation and error handling skills, the update aligned error message documentation with actual runtime behavior, supporting better onboarding and maintainability for contributors. No bugs were addressed during this period, as the primary focus was on a single, targeted documentation feature that streamlines developer guidance and ensures clearer communication of runtime errors within the Elixir ecosystem.