* lisp/window.el (display-buffer-in-side-window): In doc-string
clarify why the window returned gets dedicated to its buffer.
be reused and have its `window-slot' parameter value accordingly
modified.
-Unless `display-buffer-mark-dedicated' is non-nil, softly
-dedicate the side window used to BUFFER. Return the window used
+Unless `display-buffer-mark-dedicated' is non-nil, dedicate the
+side window used to BUFFER so that it does not get reused by
+other `display-buffer' action functions. Return the window used
for displaying BUFFER, nil if no suitable window can be found.
This function installs the `window-side' and `window-slot'