bug#49069: 28.0.50; [PATCH] Use display-buffer for re-builder

[pillule]

Hi, I wished re-builder was in a dedicated window (otherwise killing its buffer 
let you with an unwanted buffer in a narrow window), so I wrote a patch about 
it.
It also have the benefit to uses display-buffer and so, to allow 
user-customization.

0001-Use-display-buffer-for-re-builder.patch
Description: re-builder with display-buffer

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