Subject: bug#76585: ielm clobbers history on C-c C-c, C-d

From: Daniel Colascione <[email-masked]>
Date: Wed, 26 Feb 2025 07:44:54 -0500

When the ielm inferior dummy process exits, we don't save its history:
when we next start ielm, we reload its history from the save file,
losing any entries between last history save and the present.