[fix] DecoratorProxyList of the last method of a function wasn't hand…

…ling correctly the indentation of its last endl token

redbaron.py

@@ -1618,10 +1618,9 @@ def generate_separator():
             expected_list.append(generate_separator())
 
         if expected_list:
-            if self.parent.next:
-                expected_list[-1].indent = self.parent.indentation
-            else:
-                expected_list[-1].indent = ""
+            # decorators always have a next item
+            # don't break its indentation
+            expected_list[-1].indent = self.parent.indentation
 
         return expected_list
 

tests/test_proxy_list.py

@@ -1208,3 +1208,9 @@ def test_root_as_line_proxy_list_extend():
     red = RedBaron("\n\na\nb\nc\n")
     red.extend(["zob"])
     assert red.dumps() == "\n\na\nb\nc\nzob\n"
+
+
+def test_regression_first_method_of_a_class_decorators_append():
+    red = RedBaron("class A:\n    def foo():\n        pass")
+    red.def_.decorators.append("@staticmethod")
+    assert red.dumps() == "class A:\n    @staticmethod\n    def foo():\n        pass\n"