remove some unicode for terminal compatibility

fully deactivating might be (set-terminal-coding-system 'iso-latin-1)

settings/mail-settings.el

@@ -113,10 +113,10 @@ be set according to this variable."
 ;;   [\] `mu4e-headers-query-prev' - go back to previous search query
 (use-package mu4e
   :delight
-  (mu4e-main-mode "🅜ｍ")
-  (mu4e-headers-mode "🅜ｈ")  ;; will be overwitten with `mu4e~headers-search-execute'
-  (mu4e-view-mode "🅜ｖ")
-  (mu4e~update-mail-mode "🅜ｕ")
+  (mu4e-main-mode "Mum")         ;; "\u01F15C\uFF4D"
+  (mu4e-headers-mode "Muh")      ;; "\u01515C\uFF48" will be overwitten with `mu4e~headers-search-execute'
+  (mu4e-view-mode "Muv")         ;; "\u01F15C\uFF56"
+  (mu4e~update-mail-mode "Muu")  ;; "\u01F15C\uFF55"
   :commands mu4e
   :config
   ;; allow to display emoji in the subject lines of the emails
@@ -287,11 +287,11 @@ MSG is a message p-list from mu4e."
 
 (use-package notmuch
   :delight
-  (notmuch-hello-mode "🅝ｈ")
-  (notmuch-message-mode "🅝ｍ")
-  (notmuch-search-mode "🅝ｓ")
-  (notmuch-show-mode "🅝ｗ")
-  (notmuch-tree-mode "🅝ｔ")
+  (notmuch-hello-mode "Nmh")  ;; "\u01F15D\uFF48"
+  (notmuch-message-mode "Nmm")  ;; "\u01F15D\uFF4D"
+  (notmuch-search-mode "Nms")  ;; "\u01F15D\uFF53"
+  (notmuch-show-mode "Nmv")  ;; "\u01F15D\uFF57"
+  (notmuch-tree-mode "Nmt")  ;; "\u01F15D\uFF54"
   :commands notmuch
   :config
   (set-face-attribute 'notmuch-tag-flagged nil :foreground "#b1951d")