Fix long comment

Author: YuvalFilmus

Mathlib/Analysis/SpecialFunctions/Trigonometric/Chebyshev/ChebyshevGauss.lean

@@ -63,7 +63,8 @@ private theorem sum_exp {n : ℕ} {k : ℤ} (hn : n ≠ 0) (hk : ¬ (2 * n : ℤ
       show (n * (k / n * π * I)) = k * (π * I) by field [show (n : ℂ) ≠ 0 by aesop],
       Complex.exp_int_mul, Complex.exp_pi_mul_I]
 
-/-- Weighted sum of `P (x)` where `x` goes over `cos ((2 * i + 1) / (2 * n) * π)` for `0 ≤ i < n`. -/
+/-- Weighted sum of `P (x)` where `x` goes over `cos ((2 * i + 1) / (2 * n) * π)` for
+  `0 ≤ i < n`. -/
 noncomputable def sumZeroes (n : ℕ) (P : ℝ[X]) : ℝ :=
     (π / n) * ∑ i ∈ range n, P.eval (cos ((2 * i + 1) / (2 * n) * π))