PhpCsFixer\Fixer\Basic\BracesFixer::fixSpaceAroundToken PHP Method

    private function fixSpaceAroundToken(Tokens $tokens)
    {
        $controlTokens = $this->getControlTokens();
        for ($index = $tokens->count() - 1; 0 <= $index; --$index) {
            $token = $tokens[$index];
            // Declare tokens don't follow the same rules are other control statements
            if ($token->isGivenKind(T_DECLARE)) {
                $this->fixDeclareStatement($tokens, $index);
            } elseif ($token->isGivenKind($controlTokens) || $token->isGivenKind(CT::T_USE_LAMBDA)) {
                $nextNonWhitespaceIndex = $tokens->getNextNonWhitespace($index);
                if (!$tokens[$nextNonWhitespaceIndex]->equals(':')) {
                    $tokens->ensureWhitespaceAtIndex($index + 1, 0, ' ');
                }
                $prevToken = $tokens[$index - 1];
                if (!$prevToken->isWhitespace() && !$prevToken->isComment() && !$prevToken->isGivenKind(T_OPEN_TAG)) {
                    $tokens->ensureWhitespaceAtIndex($index - 1, 1, ' ');
                }
            }
        }
    }