My first commit of codes

vendor/phpunit/php-timer/build/PHPCS/Sniffs/Whitespace/ConcatenationSpacingSniff.php

@@ -0,0 +1,22 @@
+<?php
+class PHPCS_Sniffs_Whitespace_ConcatenationSpacingSniff implements PHP_CodeSniffer_Sniff
+{
+    public function register()
+    {
+        return array(T_STRING_CONCAT);
+    }
+
+    public function process(PHP_CodeSniffer_File $phpcsFile, $stackPtr)
+    {
+        $tokens = $phpcsFile->getTokens();
+
+        if ($tokens[($stackPtr - 1)]['code'] !== T_WHITESPACE ||
+            $tokens[($stackPtr + 1)]['code'] !== T_WHITESPACE) {
+
+            $phpcsFile->addError(
+              'Concatenation operator must be surrounded by whitespace',
+              $stackPtr
+            );
+        }
+    }
+}