When a buffer with ws-butler-mode enabled is saved, but is not in focus (not current buffer), ws-butler-keep-whitespace-before-point is not honored, and "virtual spaces" in front of point are not preserved.
Visit a file visiting buffer, say "test1.txt", and type "word " (that is, "word" and a space) and leave point there. Visit a second file, say "test2.txt", and from there run save-some-buffers ("C-x s"). Emacs asks for confirmation to save "text1.txt", say "y". Switch back to "text1.txt" and see that the space after "word" and before point is gone.
A slight variation where you can actually see this happening is to do the same, but from a different window. Thus. Visit "test1.txt", split the window in two with "C-x 2", switch to "text2.txt", run save-some-buffers ("C-x s"), confirm.
Example tested on GNU Emacs 28.2 (build 2, x86_64-pc-linux-gnu, GTK+ Version 3.24.20, cairo version 1.16.0) of 2022-09-12 with ws-butler-0.6.
When a buffer with
ws-butler-modeenabled is saved, but is not in focus (not current buffer),ws-butler-keep-whitespace-before-pointis not honored, and "virtual spaces" in front of point are not preserved.To reproduce, start with
emacs -Q, then setup:Visit a file visiting buffer, say "test1.txt", and type "word " (that is, "word" and a space) and leave point there. Visit a second file, say "test2.txt", and from there run
save-some-buffers("C-x s"). Emacs asks for confirmation to save "text1.txt", say "y". Switch back to "text1.txt" and see that the space after "word" and before point is gone.A slight variation where you can actually see this happening is to do the same, but from a different window. Thus. Visit "test1.txt", split the window in two with "C-x 2", switch to "text2.txt", run
save-some-buffers("C-x s"), confirm.Example tested on GNU Emacs 28.2 (build 2, x86_64-pc-linux-gnu, GTK+ Version 3.24.20, cairo version 1.16.0) of 2022-09-12 with ws-butler-0.6.