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Stefan Monnier authored
* lisp/vc/diff.el (diff-old-temp-file, diff-new-temp-file): Remove. (diff-sentinel): Get them as arguments instead. (diff-old-file, diff-new-file, diff-extra-args): Remove. (diff-file-local-copy, diff-better-file-name): New funs. (diff-no-select): Rename from diff-into-buffer. Support buffers additionally to files. Move `buf' arg. Don't display buf. Prefer closures to buffer-local variables. (diff): Adjust accordingly. (diff-buffer-with-file): Move from files.el. * lisp/files.el (diff-buffer-with-file): Move to vc/diff.el. (diff-buffer-internal): Remove. (diff-buffer-buffer): Remove. (save-some-buffers-action-alist): Use diff-no-select so as not to guess the buffer name used, and so as not to mess up windows and frames.
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