Sorts a list of expressions in lexicographic order.
LexicographicSort[{e1, e2, …}]
LexicographicSort[{e1, e2, …}, p]
LexicographicSort[{"cat", "car", "care", "apple"}]
→ {apple, car, care, cat}LexicographicSort[{{3, 1}, {1, 2}, {1, 1}, {2}}]
→ {{1, 1}, {1, 2}, {2}, {3, 1}}