Rewrite tests with long closures

tests/PHPStan/Rules/Functions/data/array_map.php

@@ -1,6 +1,8 @@
 <?php declare(strict_types = 1);
 
 array_map(
-	fn(stdClass $in): string => '',
+	function(stdClass $in): string {
+		return '';
+	},
 	[1, 2, 3]
 );

tests/PHPStan/Rules/Functions/data/array_reduce.php

@@ -2,18 +2,24 @@
 
 array_reduce(
 	[1,2,3],
-	fn(string $foo, string $current): string => $foo . $current,
+	function(string $foo, string $current): string {
+		return $foo . $current;
+	},
 	''
 );
 
 array_reduce(
 	[1,2,3],
-	fn(string $foo, int $current): string => $foo . $current,
+	function(string $foo, int $current): string {
+		return $foo . $current;
+	},
 	null
 );
 
 
 array_reduce(
 	[1,2,3],
-	fn(string $foo, int $current): string => $foo . $current,
+	function(string $foo, int $current): string {
+		return $foo . $current;
+	},
 );

tests/PHPStan/Rules/Functions/data/array_walk.php

@@ -3,12 +3,16 @@
 $array = ['foo' => 1, 'bar' => 2];
 array_walk(
 	$array,
-	fn(stdClass $in, float $key) => ''
+	function(stdClass $in, float $key): string {
+		return '';
+	}
 );
 
 $array = ['foo' => 1, 'bar' => 2];
 array_walk(
 	$array,
-	fn(int $in, string $key, int $extra) => '',
+	function(int $in, string $key, int $extra): string {
+		return '';
+	},
 	'extra'
 );