julia

3d1598e9 - Test & CoreLogging: improve inference & (no)specialization (#39177)

Test & CoreLogging: improve inference & (no)specialization (#39177) This adjusts specialization in both Base.CoreLogging and Test, and transitions to concrete types in some Test structs. It also fixes a couple of inference problems. Co-authored-by: Jameson Nash <vtjnash@gmail.com>