Make Gnus leverage visual-line-mode

Set shr-fill-text to nil; this automatically causes eww to enable
visual-line-mode.

For Gnus, the dance is a bit more involved.  Not 100% happy with where
I landed, but at least I gave myself an escape hatch by rebinding C-c
d v in summary buffers.

Also,

* lift size restriction when fontifying citations: it mostly only ever
causes fontification failures when people review big patches,
* tweak header order slightly,
* align shr heading faces with eighters-title-* faces.

1 files changed, 6 insertions, 0 deletions

diff --git a/.emacs b/.emacs
index 18f4de5..b126177 100644
--- a/.emacs
+++ b/.emacs
@@ -874,6 +874,12 @@
   (setq shell-font-lock-keywords nil)
   (add-hook 'shell-mode-hook 'my/shell-hook))
 
+(use-package shr
+  :custom
+  ;; Prefer visual-line-mode, which refills text automatically when
+  ;; the window width changes.
+  (shr-fill-text nil))
+
 (use-package which-key
   :custom
   (which-key-idle-delay 0.5)