fixed minor bugs

src/Lexer.php

@@ -9,12 +9,14 @@ class Lexer {
 	public function __construct(string $sourceCode, ?string $fileName = null) {
 		$this->fileName = $fileName;
 		$unifiedSource  = str_replace(["\r\n", "\r"], "\n", $sourceCode);
+		$unifiedSource  = str_replace("    ", "\t", $unifiedSource);
 		$this->source   = explode("\n", trim($unifiedSource, "\n"));
 	}
 
 	public function tokenize() : array {
 		$tokens = [];
 		$row    = 1;
+		$col    = 1;
 
 		foreach ($this->source as $line) {
 			if (strlen($line) < 1) {
@@ -129,7 +131,6 @@ class Lexer {
 		
 			$row++;
 		}
-		$clearBuffer();
 		array_push($tokens, new Token(TokenType::EOF, "\0", [$col, $row, $this->fileName]));
 		
 		return $tokens;

src/Parser.php

@@ -362,7 +362,7 @@ class Parser {
 
 			if ($this->current()->type === TokenType::EOF)
 				break;
-			// then we except an asterisk or a number followed by a period
+			// then we expect an asterisk or a number followed by a period
 			if ($type === ListType::UNORDERED) {
 				$asterisk = $this->consume();
 				self::Assert($asterisk->type === TokenType::ASTERISK, $asterisk, "expected asterisk, got ".$asterisk->type->name);
@@ -568,6 +568,8 @@ class Parser {
 		$head  = $this->parseTableHead();
 		$props = $this->parseTableAlignment();
 
+		self::Assert(count($props) === count($head->childNodes), $this->current(), "the number of alignment columns does not match the number of header columns");
+
 		$i = 0;
 		foreach($head->childNodes as $col) {
 			$col->setAttribute("style", "text-align: ".$props[$i]);