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simp_rw does not allow inspecting intermediate goal states #3680

@eric-wieser

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@eric-wieser

There is nowhere that I can put my cursor to see the state between the two rewrites

example {x : ℕ} : 1 + x * 2 = x + x + 1 := by
  simp_rw [mul_two, add_comm]

This was possible in Lean 3.

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