bug#16545: 24.3.50; Patch to coalesce calls to linum-update-current

[Chow Loong Jin]

When navigating using C-n/C-p with a high key repeat rate, causing
linum-schedule to be called many times in quick succession,
linum-update-current gets called as many times in linum-schedule,
eventhough one call per round should be enough to renumber the lines.

This patch adds a linum-delay-seconds option defaulting to 10ms to delay
the call to linum-update-current, thus coalescing all calls to
linum-update-current until Emacs settles for 10ms.

--
Kind regards,
Loong Jin

0001-Add-customization-option-to-delay-linum-updates.patch
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