few improvements

[MathiasReker]

/litespeedcache.php

        The use of function stripslashes() is forbidden; use Tools::stripslashes() instead

        424.
            ························$id·=·stripslashes($id);

                                $lsc = self::myInstance();
                                if (!isset($lsc->esiInjection['marker'][$id])) {
                                    $id = stripslashes($id);
                                }
                                if (!isset($lsc->esiInjection['marker'][$id])) {
                                    // should not happen

/classes/Cache.php

        Multi-line function call not indented correctly; expected 20 spaces but found 24

        337.
            ························$product['product_id'], 
        347.
            ························$pubtags, 

        Multi-line function call not indented correctly; expected 16 spaces but found 24

        338.
            ························$includeCats); 
        348.
            ························$this->config->getDefaultPurgeTagsByProduct()); 

        Closing parenthesis of a multi-line function call must be on a line by itself

        338.
            ························$includeCats); 
        348.
            ························$this->config->getDefaultPurgeTagsByProduct());