Update Mathlib/Geometry/Euclidean/Volume/Measure.lean

Co-authored-by: Eric Wieser <wieser.eric@gmail.com>

Author: wwylele

Mathlib/Geometry/Euclidean/Volume/Measure.lean

@@ -71,9 +71,9 @@ scoped[MeasureTheory] notation "μHE[" d "]" => MeasureTheory.Measure.euclideanH
 /-- show the scaling factor equals to the ratio between the volume of `d`-dimensional
 `Metric.ball` with Euclidean metric and with sup metric (i.e. a cube), or explicity,
 $\pi^{d/2} / (2^d \Gamma (d/2+1))$. -/
-proof_wanted MeasureTheory.Measure.addHaarScalarFactor_hausdorffMeasure_eq (d : ℕ):
-  addHaarScalarFactor (volume : Measure (EuclideanSpace ℝ (Fin d))) μH[d] =
-  volume (Metric.ball (0 : EuclideanSpace ℝ (Fin d)) 1) / volume (Metric.ball (0 : Fin d -> ℝ) 1)
+proof_wanted MeasureTheory.Measure.addHaarScalarFactor_hausdorffMeasure_eq (d : ℕ) :
+    addHaarScalarFactor (volume : Measure (EuclideanSpace ℝ (Fin d))) μH[d] =
+    volume (Metric.ball (0 : EuclideanSpace ℝ (Fin d)) 1) / volume (Metric.ball (0 : Fin d -> ℝ) 1)
 
 theorem MeasureTheory.Measure.euclideanHausdorffMeasure_def (d : ℕ) :
     (μHE[d] : Measure X) =