[codex] rcases の rfl パターンを紹介#2349
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Summary
Fixes #112.
LeanByExample/Tactic/Rcases.leanに、等式仮定をrcases h with rflで分解する例を追加しました。h : a = bをrflパターンで消去して、両辺が同じ形に戻る例を追加⟨rfl, hb⟩のように、ほかのrcasesパターンの中へrflを混ぜられる例を追加Validation
lake env lean LeanByExample\Tactic\Rcases.leanlake build LeanByExample.Tactic.RcasesNotes
gh auth statusreports an invalid keyring token, so the branch, commit, and PR were created through the GitHub connector.LeanByExample/TypeClass/Decidable.lean; this PR includes onlyLeanByExample/Tactic/Rcases.lean.