minor #7835 Fixed a minor syntax issue (javiereguiluz)

This PR was merged into the master branch.

Discussion
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Fixed a minor syntax issue

After merging #7313, Travis reported a minor syntax issue: the backslashes here weren't escaped:

```
:method:`Symfony\Component\HttpFoundation\Cookie::fromString`
```

Commits
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074ff88 Fixed a minor syntax issue

Author: javiereguiluz

components/http_foundation.rst

@@ -378,8 +378,9 @@ method takes an instance of
 You can clear a cookie via the
 :method:`Symfony\\Component\\HttpFoundation\\ResponseHeaderBag::clearCookie` method.
 
-Note you can create a 
-:class:`Symfony\\Component\\HttpFoundation\\Cookie` object from a raw header value using :method:`Symfony\Component\HttpFoundation\Cookie::fromString`.
+Note you can create a
+:class:`Symfony\\Component\\HttpFoundation\\Cookie` object from a raw header
+value using :method:`Symfony\\Component\\HttpFoundation\\Cookie::fromString`.
 
 .. versionadded:: 3.3
     The ``Cookie::fromString()`` method was introduced in Symfony 3.3.