PY-16747, PY-16770 generated abstract methods preserve formatting and prefix of original docstring

python/testData/refactoring/pullup/abstractMethodDocStringPrefixPreserved.after.py

@@ -0,0 +1,17 @@
+# coding=utf-8
+from abc import abstractmethod, ABCMeta
+
+
+class A:
+    __metaclass__ = ABCMeta
+
+    @abstractmethod
+    def m(self, x):
+        u"""Юникод"""
+        pass
+
+
+class B(A):
+    def m(self, x):
+        u"""Юникод"""
+        return x