Issue #28139: Fix messed up indentation

Also update the classmethod and staticmethod doc strings and comments to
match the RST documentation.
diff --git a/Modules/dlmodule.c b/Modules/dlmodule.c
index c349ad0..dfecf9d 100644
--- a/Modules/dlmodule.c
+++ b/Modules/dlmodule.c
@@ -240,7 +240,7 @@
 
     if (PyErr_WarnPy3k("the dl module has been removed in "
                         "Python 3.0; use the ctypes module instead", 2) < 0)
-    return;
+        return;
 
     /* Initialize object type */
     Py_TYPE(&Dltype) = &PyType_Type;