Changes suggested in code review

Author: oliverklee

src/CSSList/CSSList.php

@@ -167,13 +167,12 @@ private static function parseAtRule(ParserState $oParserState)
             $sMediaQuery = null;
             if (!$oParserState->comes(';')) {
                 $sMediaQuery = \trim($oParserState->consumeUntil([';', ParserState::EOF]));
+                if ($sMediaQuery === '') {
+                    $sMediaQuery = null;
+                }
             }
             $oParserState->consumeUntil([';', ParserState::EOF], true, true);
-            return new Import(
-                $oLocation,
-                $sMediaQuery !== null && $sMediaQuery !== '' && $sMediaQuery !== '0' ? $sMediaQuery : null,
-                $iIdentifierLineNum
-            );
+            return new Import($oLocation, $sMediaQuery, $iIdentifierLineNum);
         } elseif ($sIdentifier === 'charset') {
             $oCharsetString = CSSString::parse($oParserState);
             $oParserState->consumeWhiteSpace();

src/Value/CSSString.php

@@ -53,7 +53,7 @@ public static function parse(ParserState $oParserState): CSSString
         $sContent = null;
         if ($sQuote === null) {
             // Unquoted strings end in whitespace or with braces, brackets, parentheses
-            while (\in_array(\preg_match('/[\\s{}()<>\\[\\]]/isu', $oParserState->peek()), [0, false], true)) {
+            while (\preg_match('/[\\s{}()<>\\[\\]]/isu', $oParserState->peek()) !== 1) {
                 $sResult .= $oParserState->parseCharacter(false);
             }
         } else {