* lisp/completion-preview.el (completion-preview-exact): Use
more intense underline color to further distinguish this face
from 'completion-preview-common' and improve legibility with
dark background color.
(defface completion-preview-exact
;; An exact match is also the longest common prefix of all matches.
- '((t :underline "gray25" :inherit completion-preview-common))
+ '((t :underline "#00aa00" :inherit completion-preview-common))
"Face for matches in the completion preview overlay."
:version "30.1")