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31.10 ¥¢¥ó¥É¥¥¥ê¥¹¥È¤Î´ÉÍý

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¥³¥Þ¥ó¥É: buffer-enable-undo &optional buffer-or-name

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¥³¥Þ¥ó¥É: buffer-disable-undo &optional buffer
¥³¥Þ¥ó¥É: buffer-flush-undo &optional buffer

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Variable: undo-limit

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Variable: undo-strong-limit

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