Replaced ternaries with null coalescing operator

Author: JoshyPHP

src/Escaper.php

@@ -43,7 +43,7 @@ public function __construct(string $delimiter = '/')
 	*/
 	public function escapeCharacterClass(string $char): string
 	{
-		return (isset($this->inCharacterClass[$char])) ? $this->inCharacterClass[$char] : $char;
+		return $this->inCharacterClass[$char] ?? $char;
 	}
 
 	/**
@@ -54,6 +54,6 @@ public function escapeCharacterClass(string $char): string
 	*/
 	public function escapeLiteral(string $char): string
 	{
-		return (isset($this->inLiteral[$char])) ? $this->inLiteral[$char] : $char;
+		return $this->inLiteral[$char] ?? $char;
 	}
 }

src/Output/PrintableAscii.php

@@ -43,7 +43,7 @@ protected function escapeControlCode(int $cp): string
 	{
 		$table = [9 => '\\t', 10 => '\\n', 13 => '\\r'];
 
-		return (isset($table[$cp])) ? $table[$cp] : $this->escapeAscii($cp);
+		return $table[$cp] ?? $this->escapeAscii($cp);
 	}
 
 	/**