Issue #28139: Fix messed up indentation

Also update the classmethod and staticmethod doc strings and comments to
match the RST documentation.
diff --git a/RISCOS/Modules/riscosmodule.c b/RISCOS/Modules/riscosmodule.c
index 4387383..1049e65 100644
--- a/RISCOS/Modules/riscosmodule.c
+++ b/RISCOS/Modules/riscosmodule.c
@@ -46,7 +46,7 @@
 {
     char *path1, *path2;
     if (!PyArg_ParseTuple(args, "ss:rename", &path1, &path2))
-    return NULL;
+        return NULL;
     if (rename(path1,path2)) return PyErr_SetFromErrno(PyExc_OSError);
     Py_INCREF(Py_None);
     return Py_None;