Issue #28139: Fix messed up indentation

Also update the classmethod and staticmethod doc strings and comments to
match the RST documentation.
diff --git a/Objects/stringobject.c b/Objects/stringobject.c
index aa88152..60104d5 100644
--- a/Objects/stringobject.c
+++ b/Objects/stringobject.c
@@ -3287,8 +3287,8 @@
         }
         else
             return PyString_FromStringAndSize(
-            PyString_AS_STRING(self),
-            PyString_GET_SIZE(self)
+                PyString_AS_STRING(self),
+                PyString_GET_SIZE(self)
             );
     }