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Karl Heuer authored
(last_overlay_modification_hooks_used): Likewise. (syms_of_buffer): Init last_overlay_modification_hooks. (add_overlay_mod_hooklist): New function. (call_overlay_mod_hooks): Call add_overlay_mod_hooklist. (report_overlay_modification): When AFTER is non-nil, call the functions recorded in last_overlay_modification_hooks.
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