[CLEANUP] Avoid use of short-ternary operator (#1336)

(I share a birthday with Elvis, but needs must.)

Author: JakeQZ

config/phpstan-baseline.neon

@@ -18,12 +18,6 @@ parameters:
 			count: 1
 			path: ../src/CSSList/CSSList.php
 
-		-
-			message: '#^Short ternary operator is not allowed\. Use null coalesce operator if applicable or consider using long ternary\.$#'
-			identifier: ternary.shortNotAllowed
-			count: 1
-			path: ../src/CSSList/CSSList.php
-
 		-
 			message: '#^Parameters should have "string\|null" types as the only types passed to this method$#'
 			identifier: typePerfect.narrowPublicClassMethodParamType

src/CSSList/CSSList.php

@@ -242,8 +242,11 @@ private static function parseAtRule(ParserState $parserState): ?CSSListItem
      */
     private static function identifierIs(string $identifier, string $match): bool
     {
-        return (\strcasecmp($identifier, $match) === 0)
-            ?: \preg_match("/^(-\\w+-)?$match$/i", $identifier) === 1;
+        if (\strcasecmp($identifier, $match) === 0) {
+            return true;
+        }
+
+        return \preg_match("/^(-\\w+-)?$match$/i", $identifier) === 1;
     }
 
     /**