Improve Interfaces documentation

Author: nyamsprod

docs/interfaces/7.0/uri-parser-builder.md

@@ -166,12 +166,10 @@ The `build` method provides similar functionality to the `http_build_url()` func
 <p class="message-notice">The class also exposes a <code>UriString::buildAuthority</code> method you can use to build an authority from its hash representation.</p>
 <p class="message-notice">The class also exposes a <code>UriString::buildUri</code> method which strictly follow the specification.</p>
 
-## Other RFC3986 features
+## Removing dot segments
 
 <p class="message-notice">Available since version <code>7.6</code></p>
 
-### Removing dot segments
-
 To remove dot segments as per [RFC3986](https://tools.ietf.org/html/rfc3986#section-6), you need to explicitly call
 the `UriString::removeDotSegments` method. The method takes a single argument the path string and returns
 a new string which represents the path without dot segments.
@@ -185,7 +183,7 @@ $path = UriString::removeDotSegments('path/to/./the/../the/sky%7bfoo%7d');
 echo $path;  //displays 'path/to/the/sky%7Bfoo%7D'
 ~~~
 
-## Validations
+## Component and String Validation
 
 The class exposes static methods to validate that a string:
 
@@ -201,6 +199,6 @@ use League\Uri\Uri;use League\Uri\UriString;
 
 UriString::isValidScheme('foo '); //returns false because of the leading space
 UriString::isValidHost('333.333.333.1.333'); //returns true
-UriString::containsValidRfc3986Characters('http://bébé.be'); //returns false
+UriString::containsValidRfc3986Characters('http://bébé.be'); //returns false non-ascii character are not allowed
 UriString::containsValidRfc3987Characters('http://bébé.be'); //returns true
 ~~~