Add line-number faces to the display-line-numbers group

See https://lists.gnu.org/archive/html/emacs-devel/2017-10/msg00151.html
and its resulting thread.

* lisp/display-line-numbers.el (display-line-numbers): Add to the
convenience group.
* lisp/faces.el (line-number):
(line-number-current-line): Add to the display-line-numbers group.

2 files changed, 5 insertions, 2 deletions

diff --git a/lisp/display-line-numbers.el b/lisp/display-line-numbers.el
index 3b6b101de49..15e04279156 100644
--- a/lisp/display-line-numbers.el
+++ b/lisp/display-line-numbers.el
@@ -36,6 +36,7 @@
 
 (defgroup display-line-numbers nil
   "Display line numbers in the buffer."
+  :group 'convenience
   :group 'display)
 
 (defcustom display-line-numbers-type t
diff --git a/lisp/faces.el b/lisp/faces.el
index 24ab1fa4f0c..a5f1d1dd328 100644
--- a/lisp/faces.el
+++ b/lisp/faces.el
@@ -2483,7 +2483,8 @@ monospaced font, otherwise line numbers will not line up,
 and text lines might move horizontally as you move through
 the buffer."
   :version "26.1"
-  :group 'basic-faces)
+  :group 'basic-faces
+  :group 'display-line-numbers)
 
 (defface line-number-current-line
   '((t :inherit line-number))
@@ -2497,7 +2498,8 @@ the buffer.  Similarly, making this face's font different
 from that of the `line-number' face could produce such
 unwanted effects."
   :version "26.1"
-  :group 'basic-faces)
+  :group 'basic-faces
+  :group 'display-line-numbers)
 
 (defface escape-glyph
   '((((background dark)) :foreground "cyan")