Jesung Yang dd33c82f6b feat: pretty print attributes up to cfg(false)
Extend ItemTree pretty-printing to include attributes even when a cfg
expression evaluates to false, emitting explicit `cfg(cfg_expr)` marker
after the attributes.

This improves testability of ItemTree attribute handling by exposing
more information in pretty-printed output.
2025-12-18 00:16:34 +00:00
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