Using strpos to remove colon character

src/Purl/Fragment.php

@@ -7,6 +7,8 @@
 use function array_merge;
 use function parse_url;
 use function sprintf;
+use function strpos;
+use function substr;
 
 /**
  * Fragment represents the part of a Url after the hashmark (#).
@@ -109,6 +111,10 @@ public function __toString() : string
     protected function doInitialize() : void
     {
         if ($this->fragment !== null) {
+            $pos = strpos($this->fragment, ':', 1);
+            if ($pos !== false) {
+                $this->fragment = substr($this->fragment, 0, $pos);
+            }
             $data = parse_url($this->fragment);
             if ($data === false) {
                 $data = ['path' => $this->fragment];

tests/Purl/Test/UrlTest.php

@@ -365,7 +365,7 @@ public function testRelativeUrl() : void
 
         // test fragment with colon
         $url = new Url('http://example.com/#hello:123');
-        $this->assertEquals('http://example.com/', (string) $url);
+        $this->assertEquals('http://example.com/#hello', (string) $url);
     }
 }