Feature: fixable LeadingSlash error in PSR12.Files.ImportStatement

This can be easily fixable, just be removing the slash.
Added .fixed file with expected result of the fixer.

Author: michalbundyra

src/Standards/PSR12/Sniffs/Files/ImportStatementSniff.php

@@ -65,7 +65,11 @@ public function process(File $phpcsFile, $stackPtr)
         }
 
         $error = 'Import statements must not begin with a leading backslash';
-        $phpcsFile->addError($error, $next, 'LeadingSlash');
+        $fix = $phpcsFile->addFixableError($error, $next, 'LeadingSlash');
+
+        if ($fix === true) {
+            $phpcsFile->fixer->replaceToken($next, '');
+        }
 
     }//end process()
 

src/Standards/PSR12/Tests/Files/ImportStatementUnitTest.inc.fixed

@@ -0,0 +1,19 @@
+<?php
+use Vendor\Package\{ClassA as A, ClassB, ClassC as C};
+use Vendor\Package\SomeNamespace\ClassD as D;
+use /*comment*/ Vendor\Package\AnotherNamespace\ClassE as E;
+
+use function Vendor\Package\{functionA, functionB, functionC};
+use FUNCTION Another\Vendor\functionD;
+
+use CONST Vendor\Package\{CONSTANT_A, CONSTANT_B, CONSTANT_C};
+use const Another\Vendor\CONSTANT_D;
+
+class ClassName3
+{
+    use \FirstTrait;
+    use SecondTrait;
+    use ThirdTrait;
+}
+
+$foo = function() use($bar) {};