some changes

functions/c_fisher.fish

@@ -6,13 +6,13 @@
 # ╰───────────────────────────────────╯
 
 function check_fisher
-if [[ ! -e $HOME/.config/fish/functions/fisher.fish ]]
+if [ ! -f $HOME/.config/fish/functions/fisher.fish ]
   curl -sL https://raw.githubusercontent.com/jorgebucaran/fisher/main/functions/fisher.fish | source && fisher install jorgebucaran/fisher
 else
 # ─< define plugins to use with fisher >────────────────────────────────────────────────────
 set plugin "PatrickF1/fzf.fish" "jorgebucaran/autopair.fish"
     for plug in $plugin
-        fisher update $plu ||  fisher install $plug
+        fisher update $plug ||  fisher install $plug
         end
     end
 end
@@ -20,3 +20,4 @@ end
 
 function plugins_fisher
 end
+

functions/tmux.fish

@@ -1,6 +1,6 @@
-if command -v tmux 2>&1
+if command -v tmux /dev/null 2>&1
   function ta
-command tmux list-sessions 2>&1
+command tmux list-sessions /dev/null 2>&1
     switch $status
       case '0'
       tmux a