Extend next-error-message face to the edge of the window (bug#32676)

* lisp/simple.el (next-error-message): Add ':extend t' to this face.
(next-error-message-highlight): Put overlay over the newline as well.
1 job for master in 63 minutes and 50 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Test
passed #8325
test-all

01:03:50