Using the single the

Author: tscrim

src/sage/combinat/permutation.py

@@ -3243,7 +3243,7 @@ def schubert_determinant_ideal(self):
         where the sum is over the :meth:`essential set
         <sage.combinat.diagram.Diagram.essential_set>`, `[r_w(i, j)]_{i, j}`
         is the :meth:`rank_matrix` of `w`, and `I_k(i, j)` is the ideal
-        generated by the the `k \times k` minors of the `i \times j`
+        generated by the `k \times k` minors of the `i \times j`
         matrix `[z_{ab}]_{a, b}`.
 
         These ideals are known to be prime of codimension equal to `\ell(w)`