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Two buffer-local variables are used to record the modification count
(see section Buffer Attributes) of a buffer when it is saved.
- Variable: last-save-changes
-
A buffer-local variable containing the number of modifications made to
the buffer the last time it was saved (either auto-saved or by the user).
- Variable: last-user-save-changes
-
This buffer-local variable holds the number of modifications made to the
buffer when it was last saved by the user.
- Variable: last-save-time
-
A buffer-local variable holding the system time (from the
current-time
function) from when the buffer was last saved (auto-saved or by the user).
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