git diff swift-5.1-RELEASE swift-5.2-RELEASE -- stdlib/public/runtime/CompatibilityOverride.def git diff swift-5.1-RELEASE swift-5.2-RELEASE -- stdlib/public/runtime/CompatibilityOverride.def git diff swift-5.2-RELEASE swift-5.3-RELEASE -- stdlib/public/runtime/CompatibilityOverride.def

このへんもdiffゼロだけどセクション名更新されてますね