Reworded the note as a code comment

Author: javiereguiluz

components/finder.rst

@@ -103,14 +103,13 @@ Each pattern has to resolve to at least one directory path.
 Exclude directories from matching with the
 :method:`Symfony\\Component\\Finder\\Finder::exclude` method::
 
+    // directories passed as argument must be relative to the ones defined with the in() method
     $finder->in(__DIR__)->exclude('ruby');
 
 .. versionadded:: 2.3
    The :method:`Symfony\\Component\\Finder\\Finder::ignoreUnreadableDirs`
    method was introduced in Symfony 2.3.
 
-Note that the excluded paths provided are relative to the `in()` directories.
-
 It's also possible to ignore directories that you don't have permission to read::
 
     $finder->ignoreUnreadableDirs()->in(__DIR__);