now installing tmux plugins only when no arguments are provided

ansible/roles/fish/files/fish/functions/tmux.fish

@@ -4,13 +4,13 @@ function tmux
       # Update Oh My Fish if it installed
       omf update
     end
-  end
 
     # Install Tmux plugins
     ~/.tmux/plugins/tpm/bin/install_plugins
 
     # Update Tmux plugins
     ~/.tmux/plugins/tpm/bin/install_plugins
+  end
 
   # Execute TMUX
   /usr/bin/tmux -u $argv