Fix element labeling in OperationTable.color_table

The labels were transposed.

Author: rburing

src/sage/matrix/operation_table.py

@@ -1011,9 +1011,8 @@ def color_table(self, element_names=True, cmap=None, **options):
             # iterate through each element
             for g in range(n):
                 for h in range(n):
-
                     # add text to the plot
-                    tPos = (g, h)
+                    tPos = (h, g)
                     tText = widenames[self._table[g][h]]
                     t = text(tText, tPos, rgbcolor=(0, 0, 0))
                     plot = plot + t