Theorem: Matroid.loop_of_not_nonloop (Matroid/Loop.lean)

State before:
α : Type u_1
β : Type u_2
M N : Matroid α
e f : α
B L L' I X Y Z F C K : Set α
he : autoParam (e ∈ M.E) _auto✝
h : ¬M.Nonloop e
⊢ M.Loop e
Tactic:
rwa [Nonloop, and_iff_left he, not_not] at h
State after:
no goals