Deleted extra whitespace

Author: annechko

src/Standards/Generic/Sniffs/NamingConventions/InterfaceSuffixRequiredForInterfaceSniff.php

@@ -43,7 +43,7 @@ public function process(File $phpcsFile, $stackPtr)
             return;
         }
 
-        $suffix = substr($interfaceName, - 9);
+        $suffix = substr($interfaceName, -9);
         if (strtolower($suffix) !== 'interface') {
             $phpcsFile->addError('Interfaces MUST be suffixed by Interface: e.g. BarInterface. Found: %s', $stackPtr, 'Missing', [$interfaceName]);
         }

src/Standards/Generic/Sniffs/NamingConventions/TraitSuffixRequiredForTraitSniff.php

@@ -43,7 +43,7 @@ public function process(File $phpcsFile, $stackPtr)
             return;
         }
 
-        $suffix = substr($traitName, - 5);
+        $suffix = substr($traitName, -5);
         if (strtolower($suffix) !== 'trait') {
             $phpcsFile->addError('Traits MUST be suffixed by Trait: e.g. BarTrait. Found: %s', $stackPtr, 'Missing', [$traitName]);
         }