Редирект с .html/ на .html

RewriteCond %{THE_REQUEST} //
RewriteRule .* /$0 [R=301,L]

RewriteEngine on 

RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^/?(.*)/+$ /$1 [R=301,L,QSA]

RewriteCond %{REQUEST_FILENAME} !\.html
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME}\.html -f 
RewriteRule ^/?(.*?)/?$ $1.html