moodle/theme/base/style/search.css

.search-results .result {
    margin-left: 0;
    margin-right: 0;
}

.dir-rtl .search-results .result {
    margin-right: 15px;
    margin-left: 0;
}

.search-results .result .result-content {
    margin: 7px 0;
}

.search-results .result .filename {
    font-style: italic;
}