correcting documentation errors

Sandstorm831 · dimpase · commit 2083932c0965 · 2023-02-15T00:21:57.000Z
diff --git a/src/sage/combinat/posets/linear_extensions.py b/src/sage/combinat/posets/linear_extensions.py
@@ -253,7 +253,7 @@ def is_greedy(self):
         return True
 
     def is_supergreedy(self):
-        r""""
+        r"""
         Return ``True`` if the linear extension is supergreedy.
         
         A linear extension `[x_1<x_2<...<x_t]` of a finite ordered
