added custom assertion error

index.php

@@ -2,8 +2,6 @@
 
 require __DIR__."/vendor/autoload.php";
 
-
-
 echo "
 <style>
 	body {
@@ -33,7 +31,7 @@ $source = file_get_contents($file);
 try {
 	$Instance = new parkdown\Parkdown($source, true, $file);
 	echo $Instance->html();
-} catch (AssertionError $error) {
+} catch (parkdown\ParserError $error) {
 	echo "<pre>";
 
 	$message  = explode(" ", $error->getMessage());
@@ -47,7 +45,6 @@ try {
 
 	
 	$stackTrace = explode("\n", $error->getTraceAsString());
-	array_shift($stackTrace);
 
 	echo "<p><small>";
 		foreach ($stackTrace as $step) {

src/Parser.php

@@ -6,6 +6,7 @@ use Attribute;
 use DOMDocument;
 use DOMElement;
 use DOMNode;
+use phpDocumentor\Reflection\DocBlock\Tags\Throws;
 
 enum ListType {
 	case ORDERED;
@@ -79,7 +80,7 @@ class Parser {
 	}
 
 	private static function Assert(bool $assertion, Token $token, string $message = "") : void {
-		assert($assertion, self::LOC($token->location).$message);
+		assert($assertion, new ParserError(self::LOC($token->location).$message));
 	}
 
 	private function resolveReferences(DOMElement $node) : void {

src/ParserError.php

@@ -0,0 +1,7 @@
+<?php declare(strict_types=1);
+
+namespace parkdown;
+
+use AssertionError;
+
+class ParserError extends AssertionError {}