编辑htaccess文件以删除最后的斜杠

Question

我的网站URL的末尾有一个斜杠，并显示为

https://mywebsite.com/

由于搜索引擎读取了

https://mywebsite.com/
and
https://mywebsite.com

作为两个不同的URL，我要删除它们。

这是我现有的.htaccess文件

RewriteEngine On
RewriteCond %{HTTPS} !=on
RewriteRule ^ https://%{HTTP_HOST}%{REQUEST_URI} [L,R=301]

<ifModule mod_headers.c>
  <filesMatch "\\.(css|js|html|jpg|png)$">
      Header set Cache-Control "max-age=2592000, public"
  </filesMatch>
</ifModule>

<IfModule mod_rewrite.c>
    <IfModule mod_negotiation.c>
        Options -MultiViews -Indexes
    </IfModule>
    RewriteEngine On
    # Handle Authorization Header
    RewriteCond %{HTTP:Authorization} .
    RewriteRule .* - [E=HTTP_AUTHORIZATION:%{HTTP:Authorization}]

    # Redirect Trailing Slashes If Not A Folder...
    RewriteCond %{REQUEST_FILENAME} !-d
    RewriteCond %{REQUEST_URI} (.+)/$
    RewriteRule ^ %1 [L,R=301]

    # Handle Front Controller...
    RewriteCond %{REQUEST_FILENAME} !-d
    RewriteCond %{REQUEST_FILENAME} !-f
    RewriteRule ^ index.php [L]
</IfModule>
RewriteCond %{HTTPS} off
RewriteCond %{HTTP:X-Forwarded-SSL} !on
RewriteCond %{HTTP_HOST} ^mywebsite\.com$ [OR]
RewriteCond %{HTTP_HOST} ^www\.mywebsite\.com$
RewriteRule ^/?$ "https\:\/\/mywebsite\.com\/" [R=301,L]

要在末尾删除斜杠，我必须添加以下代码：

RewriteCond %{HTTP_HOST} (.*)
RewriteCond %{REQUEST_URI} /$ [NC]
RewriteRule ^(.*)(/)$ $ 1 [L,R =301]

我的网站有HTTPS。每当添加以上代码时，我最终都会出错。如何添加它而不弄乱现有配置。