add flex stretch explanation in wrap mode
Signed-off-by: Nxiexiyun <xiexiyun@huawei.com>
Change-Id: I7d762f81b1a72be6a73750150711193ead47a38f
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Signed-off-by: Nxiexiyun <xiexiyun@huawei.com>
Change-Id: I7d762f81b1a72be6a73750150711193ead47a38f