--- a/.emacs-my	Sun Jun 17 22:50:13 2018 +0300
+++ b/.emacs-my	Wed Jul 11 14:49:36 2018 +0300
@@ -513,7 +513,7 @@
 
 ;; For (display-time-world).
 (setq display-time-world-time-format "%A %d %B %R %z %Z")
-(when (boundp 'display-time-world-list) ; Absent in Emacs 22.
+(when (and (boundp 'display-time-world-list) (not (eq t display-time-world-list))) ; Missing in Emacs 22.
   (mapc (lambda (el) (add-to-list 'display-time-world-list el))
         '(("EET" "UTC+2, Eastern European Time")
           ("EST" "UTC-5, Eastern Standard Time, New York")
@@ -2520,11 +2520,11 @@
 ;; (defun my-diff-auto-refine-mode-on () (diff-auto-refine-mode 1))
 ;; (add-hook 'diff-mode-hook 'my-diff-auto-refine-mode-on)
 
-(when window-system
+(when (and window-system (< emacs-major-version 26))
   (my--eval-after-load diff-mode
-    (set-face-foreground 'diff-added-face "DarkGreen")
-    (set-face-foreground 'diff-removed-face "DarkRed")
-    (set-face-background 'diff-refine-change "LightBlue1")))
+    (set-face-foreground 'diff-added "DarkGreen")
+    (set-face-foreground 'diff-removed "DarkRed")
+    (set-face-background 'diff-refine-changed "LightBlue1")))
 
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 (message "vc-mode, VCS, version control, cvs, svn, mercurial, hg, bazaar, bzr, git, fossil")