Address more reviewer comments

src/Standards/Generic/Sniffs/Files/FilePermissionsSniff.php

@@ -45,8 +45,9 @@ public function process(File $phpcsFile, $stackPtr)
             $perms = fileperms($phpcsFile->getFilename());
 
             if (($perms & 0x0040) !== 0 || ($perms & 0x0008) !== 0 || ($perms & 0x0001) !== 0) {
-                $error = "A PHP file should not be executable";
-                $phpcsFile->addError($error, $stackPtr, 'Executable');
+                $error = "A PHP file should not be executable. Found file permission set to %s.";
+                $data  = [substr(sprintf('%o', $perms), -4)];
+                $phpcsFile->addError($error, 0, 'Executable', $data);
             }
         }
 

src/Standards/Generic/Tests/Files/FilePermissionsUnitTest.1.inc

@@ -0,0 +1 @@
+<?php

src/Standards/Generic/Tests/Files/FilePermissionsUnitTest.2.inc

@@ -0,0 +1 @@
+<?php

src/Standards/Generic/Tests/Files/FilePermissionsUnitTest.php

@@ -0,0 +1,57 @@
+<?php
+/**
+ * Unit test class for the FilePermissions sniff.
+ *
+ * @author    Matthew Peveler <matt.peveler@gmail.com>
+ * @copyright 2019 Matthew Peveler
+ * @license   https://github.com/squizlabs/PHP_CodeSniffer/blob/master/licence.txt BSD Licence
+ */
+
+namespace PHP_CodeSniffer\Standards\Generic\Tests\Files;
+
+use PHP_CodeSniffer\Tests\Standards\AbstractSniffUnitTest;
+
+class FilePermissionsUnitTest extends AbstractSniffUnitTest
+{
+
+
+    /**
+     * Returns the lines where errors should occur.
+     *
+     * The key of the array should represent the line number and the value
+     * should represent the number of errors that should occur on that line.
+     *
+     * @param string $testFile The name of the file being tested.
+     *
+     * @return array<int, int>
+     */
+    public function getErrorList($testFile='')
+    {
+        switch ($testFile) {
+        case 'FilePermissionsUnitTest.2.inc':
+            return [1 => 1];
+        default:
+            return [];
+        }//end switch
+
+    }//end getErrorList()
+
+
+    /**
+     * Returns the lines where warnings should occur.
+     *
+     * The key of the array should represent the line number and the value
+     * should represent the number of warnings that should occur on that line.
+     *
+     * @param string $testFile The name of the file being tested.
+     *
+     * @return array<int, int>
+     */
+    public function getWarningList($testFile='')
+    {
+        return [];
+
+    }//end getWarningList()
+
+
+}//end class