fix user .bashrc has forked

lib/initiate.bash

@@ -53,7 +53,7 @@ function fix_users_bashrc {
           echo -e "$new_lines" | sudo -u "$user" -- tee -a "$user_bashrc"
           echo "INFO: .bashrc for user <$user> merged succesfully"
         fi
-      else
+      elif ! cmp -s "$MIAOU_BASH_DIR"/etc/skel/.bashrc "$user_bashrc"; then
         local backup="$user_bashrc".ORIGINAL
         sudo -u "$user" -- mv "$user_bashrc" "$backup"
         sudo -u "$user" -- cp "$MIAOU_BASH_DIR"/etc/skel/.bashrc "$user_bashrc"