InnerLayer.SLAYER - MINOR - Deduplicate the iota_e normalization commentary

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Author: d-burg

src/InnerLayer/SLAYER/LayerParameters.jl

@@ -355,9 +355,8 @@ function slayer_parameters(;
 
     # Normalized beta-related width and Δ-normalization
     d_beta = c_beta * d_i
-    # D = S^(1/3)·iota_e^(1/2)·(d_beta/r_s). iota_e is the electron share of the
-    # total diamagnetic frequency; it reduces to 1/(1+tau) only when the electron
-    # and ion pressure-gradient scale lengths match, so use the computed value.
+    # iota_e is the electron share of the total diamagnetic frequency; it reduces to
+    # 1/(1+tau) only when the electron and ion pressure-gradient scale lengths match.
     D_norm = (d_beta / rs) * lu^(1.0 / 3.0) * sqrt(iota_e)
     delta_n = lu^(1.0 / 3.0) / rs