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Chong Yidong authored
the mtime of the directory-local variables file (Bug#2833). (dir-locals-set-directory-class): New arg mtime. Store it in dir-locals-directory-cache. (dir-locals-find-file): Check cache validity using the mtime. (dir-locals-read-from-file): Save the file mtime in the cache. (hack-dir-local-variables): Adapt to new dir-locals-directory-cache entry format.
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