sin-ack ecbe17fb11 LibLine+Shell: Add dirty history flag and use it ...

This patch adds a new flag called history_dirty to Line::Editor that is
set when history is added to but written.  Applications can leverage
this flag to write history only when it changes.  This patch adds an
example usage of this functionality to Shell, which will now only save
the history when it is dirty.

2021-05-11 17:26:30 +01:00

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