.htaccess remove trailing slash before redirect - .htaccess

Question

I am having trouble with removing the trailing slash when i redirect to another page.
See my code:
Redirect /contact example.com/page
When I run the code above it redirects me to example.com/page/ with a trailing slash.
I would like to know how I can remove the trailing slash from the url.
Full .htaccess:
# All explanations you could find in .htaccess.sample file
Redirect /configurator.html /box.html
Redirect /catalog/category/view/s/blog/id/9 http://www.example.nl/blog
Redirect /contact/index/ http://www.example.com/contact.html
Redirect /contact.html/post http://www.example.com/contact.html
DirectoryIndex index.php
<IfModule mod_php5.c>
php_value memory_limit 768M
php_value max_execution_time 18000
php_flag session.auto_start off
php_flag suhosin.session.cryptua off
</IfModule>
<IfModule mod_php7.c>
php_value memory_limit 768M
php_value max_execution_time 18000
php_flag session.auto_start off
php_flag suhosin.session.cryptua off
</IfModule>
<IfModule mod_security.c>
SecFilterEngine Off
SecFilterScanPOST Off
</IfModule>
<IfModule mod_ssl.c>
SSLOptions StdEnvVars
</IfModule>
<IfModule mod_rewrite.c>
Options +FollowSymLinks
RewriteEngine on
RewriteRule .* - [E=HTTP_AUTHORIZATION:%{HTTP:Authorization}]
RewriteCond %{REQUEST_METHOD} ^TRAC[EK]
RewriteRule .* - [L,R=405]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-l
RewriteRule .* index.php [L]