Do not add space if empty string

Author: alexndlm

src/Ast/PhpDoc/PhpDocNode.php

@@ -271,7 +271,14 @@ public function getTypeAliasImportTagValues(string $tagName = '@phpstan-import-t
 
 	public function __toString(): string
 	{
-		return "/**\n * " . implode("\n * ", $this->children) . "\n */";
+		$children = array_map(
+			static function (PhpDocChildNode $child): string {
+				$s = (string) $child;
+				return $s === '' ? '' : ' ' . $s;
+			},
+			$this->children
+		);
+		return "/**\n *" . implode("\n *", $children) . "\n */";
 	}
 
 }

tests/PHPStan/Ast/PhpDoc/NodePrintTest.php

@@ -25,6 +25,19 @@ public function providePhpDocData(): \Iterator
 			]),
 			'/**
  * It works
+ */',
+		];
+
+		yield [
+			new PhpDocNode([
+				new PhpDocTextNode('It works'),
+				new PhpDocTextNode(''),
+				new PhpDocTextNode('with empty lines'),
+			]),
+			'/**
+ * It works
+ *
+ * with empty lines
  */',
 		];
 	}