update diff-mode face

emacs.el

@@ -649,11 +649,12 @@ drill-instructor.el"
               (set-face-bold-p s nil))
             (let ((s 'diff-context))
               ;; (set-face-foreground s "white")
-              (set-face-bold-p s t))
-            (set-face-foreground 'diff-context-face nil)
+              (set-face-bold-p s nil)
+              (set-face-foreground s nil))
             (set-face-foreground 'diff-removed-face "red")
             (set-face-foreground 'diff-added-face "green")
             (set-face-foreground 'diff-changed-face "magenda")
+            (set-face-bold-p 'diff-changed nil)
             ))
 
 ;; (ffap-bindings)