Tweaks and nitpicks from Girgas

Co-authored-by: Gina Peter Banyard <girgias@php.net>

language/oop5/interfaces.xml

@@ -92,15 +92,15 @@
   <sect2 xml:id="language.oop5.interfaces.properties">
    <title>Properties</title>
    <para>
-    As of PHP 8.4, interfaces may also declare properties.  If they do, the declaration must specify if the
+    As of PHP 8.4.0, interfaces may also declare properties.  If they do, the declaration must specify if the
     property is to be readable, writeable, or both.  The interface declaration applies only to public read
     and write access.
    </para>
    <para>
     An class may satisfy an interface property in multiple ways.  It may define a public property.  It may
     define a public <link linkend="language.oop5.property-hooks.virtual">virtual property</link> that implements
-    only the corresponding hook.  Or a read property may be satisfied by a <literal>readonly</literal> property.  An interface property that is settable may not
-    be <literal>readonly</literal>, however.
+    only the corresponding hook.  Or a read property may be satisfied by a <literal>readonly</literal> property.
+    However, an interface property that is settable may not be <literal>readonly</literal>.
    </para>
    <example>
     <title>Interface properties example</title>
@@ -141,8 +141,8 @@ class C2 implements I
     private string $all = '';
  
     // Uses only a get hook to create a virtual property.
-    // This satisfies the "public get" requirement. It is not
-    // writeable, but that is not required by the interface.
+    // This satisfies the "public get" requirement.
+    // It is not writeable, but that is not required by the interface.
     public string $readable { get => strtoupper($this->writeable); }
  
     // The interface only requires the property be settable,

language/oop5/property-hooks.xml

@@ -71,7 +71,7 @@ print $example->foo;
     </programlisting>
    </example>
    <para>
-    The <varname>$foo</varname> property ends in <literal>{}</literal>, rather than a semicolon.
+    The <varname>foo</varname> property ends in <literal>{}</literal>, rather than a semicolon.
     That indicates the presence of hooks.  Both a <literal>get</literal> and <literal>set</literal>
     hook are defined, although it is allowed to define only one or the other.  Both hooks have a body,
     denoted by <literal>{}</literal>, that may contain arbitrary code.
@@ -81,7 +81,7 @@ print $example->foo;
     using the same syntax as a method.  The type must be either the same as the type of the property,
     or <link linkend="language.oop5.variance.contravariance">contravariant</link> (wider) to it.
     For instance, a property of type <type>string</type> could
-    have a <literal>set</literal> hook that accepts <type>string|Stringable</type>,
+    have a <literal>set</literal> hook that accepts <type class="union"><type>string</type><type>Stringable</type></type>,
     but not one that only accepts <type>array</type>.
    </para>
    <para>
@@ -254,7 +254,8 @@ $s->area = 30; // Error, as there is no set operation defined.
    </para>
    <para>
     The most notable implication of this is that non-trivial hooks may sub-call to an
-    arbitrarily complex method if they wish.</para>
+    arbitrarily complex method if they wish.
+   </para>
    <example>
     <title>Calling a method from a hook</title>
     <programlisting role="php">
@@ -319,7 +320,7 @@ class Person {
     <example>
      <title>Final hooks</title>
      <programlisting role="php">
-      <![CDATA[
+<![CDATA[
 <?php
 class User
 {

language/oop5/variance.xml

@@ -250,7 +250,8 @@ Fatal error: Uncaught TypeError: Argument 1 passed to Animal::eat() must be an i
    and "set" operations must be contravariant. The only way for a property to satisfy both requirements is to be invariant.
   </para>
   <para>
-   Since PHP 8.4, with the addition of abstract properties (on an interface or abstract class) and <link linkend="language.oop5.property-hooks.virtual">virtual properties</link>,
+   As of PHP 8.4.0, with the addition of abstract properties (on an interface or abstract class) and
+   <link linkend="language.oop5.property-hooks.virtual">virtual properties</link>,
    it is possible to declare a property that has only a get or set operation.
    As a result, abstract properties or virtual properties that have only a "get" operation required may be covariant.
    Similarly, an abstract property or virtual property that has only a "set" operation required may be contravariant.