Improvements related to the config location and spawning the editor

Via https://linuxfr.org/nodes/134968/comments/1952011

L

@@ -22,7 +22,7 @@
 
 set -e
 
-CONFIG_FILE="${HOME}/.config/Ljournalrc";
+CONFIG_FILE="${XDG_CONFIG_HOME:-$HOME/.config}/Ljournalrc"
 
 if [ ! -f "${CONFIG_FILE}" ]; then
     mkdir -p "$(dirname "$CONFIG_FILE")"
@@ -58,13 +58,12 @@ fi
 
 if [ "$1" = "e" ]; then
     if [ -z "$EDITOR" ]; then
-        if   [ -f "$(which nano)" ];  then
-            EDITOR=nano
-        elif [ -f "$(which vim)" ];   then
-            EDITOR=vim
-        elif [ -f "$(which emacs)" ]; then
-            EDITOR=emacs
-        fi
+        for prog in 'nano' 'jed' 'jove' 'vim' 'nvim' 'emacs' ; do
+            if command -v $prog >/dev/null; then
+                EDITOR=$prog
+                break
+            fi
+        done
     fi
     exec "$EDITOR" "${JOURNAL_FILE}"
 fi