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是否有必要安装 Cygwin(包括 diff)或 MinGW(可能也这样做)来确定 foobar.txt 和 foobar.txt 之间的差异〜?
只要你的 PATH 中有一个 diff.exe 程序,例如 GNUWin32 diff-utils 版本,你就不需要这些。Emacs 本身不包括执行差异的机制。