Fix sniff issues, exclude 'cases' test files from codesniff

phpcs.xml.dist

@@ -2,6 +2,7 @@
 <ruleset name="PHP Language Server">
     <file>src</file>
     <file>tests</file>
+    <exclude-pattern>tests/Validation/cases</exclude-pattern>
     <rule ref="PSR2">
         <exclude name="PSR2.Namespaces.UseDeclaration.MultipleDeclarations"/>
         <exclude name="PSR2.ControlStructures.ElseIfDeclaration.NotAllowed"/>

src/ParserHelpers.php

@@ -121,4 +121,4 @@ function isConstDefineExpression(Node $node): bool
         && isset($node->argumentExpressionList->children[0])
         && $node->argumentExpressionList->children[0]->expression instanceof Node\StringLiteral
         && isset($node->argumentExpressionList->children[2]);
-}
+}

tests/Validation/ValidationTest.php

@@ -43,8 +43,8 @@ class ValidationTest extends TestCase
     }
 
     /**
-     * This test loads the test cases specified in .php files under cases/ and looks at the whole set of 
+     * This test loads the test cases specified in .php files under cases/ and looks at the whole set of
-     * Definitions and References produced. It reads the expected results from associated .json files 
+     * Definitions and References produced. It reads the expected results from associated .json files
      * and compares to the actual result. If they don't match, the test fails and it writes the new baseline
      * to the .json file.
      * @group validation