Fix link to true and false types (#197)

Author: vrana

phpdotnet/phd/Package/PHP/XHTML.php

@@ -693,7 +693,7 @@ public function format_type_text($type, $tagname) {
             break;
         case "false":
         case "true":
-            $href = "language.types.value";
+            $href = "language.types.singleton";
             break;
         case "null":
             if ($this->simple_nullable) {

tests/package/php/type_rendering_001.phpt

@@ -46,7 +46,7 @@ Content:
 
  <div class="section">
   <p class="para">%d. Function/method with union return type</p>
-  <div class="methodsynopsis dc-description"><span class="methodname"><strong>function_name</strong></span>(): <span class="type"><span class="type"><a href="language.types.integer.html" class="type int">int</a></span>|<span class="type"><a href="language.types.float.html" class="type float">float</a></span>|<span class="type"><a href="language.types.value.html" class="type false">false</a></span></span></div>
+  <div class="methodsynopsis dc-description"><span class="methodname"><strong>function_name</strong></span>(): <span class="type"><span class="type"><a href="language.types.integer.html" class="type int">int</a></span>|<span class="type"><a href="language.types.float.html" class="type float">float</a></span>|<span class="type"><a href="language.types.singleton.html" class="type false">false</a></span></span></div>
 
  </div>
 
@@ -58,7 +58,7 @@ Content:
 
  <div class="section">
   <p class="para">%d. Function/method with nullable union return type</p>
-  <div class="methodsynopsis dc-description"><span class="methodname"><strong>function_name</strong></span>(): <span class="type"><span class="type"><a href="language.types.string.html" class="type string">string</a></span>|<span class="type"><a href="language.types.array.html" class="type array">array</a></span>|<span class="type"><a href="language.types.resource.html" class="type resource">resource</a></span>|<span class="type"><a href="language.types.callable.html" class="type callable">callable</a></span>|<span class="type"><a href="language.types.iterable.html" class="type iterable">iterable</a></span>|<span class="type"><a href="language.types.value.html" class="type true">true</a></span>|<span class="type"><a href="language.types.null.html" class="type null">null</a></span></span></div>
+  <div class="methodsynopsis dc-description"><span class="methodname"><strong>function_name</strong></span>(): <span class="type"><span class="type"><a href="language.types.string.html" class="type string">string</a></span>|<span class="type"><a href="language.types.array.html" class="type array">array</a></span>|<span class="type"><a href="language.types.resource.html" class="type resource">resource</a></span>|<span class="type"><a href="language.types.callable.html" class="type callable">callable</a></span>|<span class="type"><a href="language.types.iterable.html" class="type iterable">iterable</a></span>|<span class="type"><a href="language.types.singleton.html" class="type true">true</a></span>|<span class="type"><a href="language.types.null.html" class="type null">null</a></span></span></div>
 
  </div>