Typo fix in scaling.

pymagglobal/utils.py

@@ -477,4 +477,4 @@ def dsh_basis(lmax, z, out, R=REARTH):
     out[:, 2::3] *= -(ell+1)
 
     # Scaling for sources of internal origin
-    out *= np.repeat((R/z[2:3, :])**(l+2), 3, axis=1)
+    out *= np.repeat((R/z[2:3, :])**(ell+2), 3, axis=1)