src/static/js/Intl.js
function $$core$$toLatinUpperCase (str) {
        var i = str.length;

        while (i--) {
            var ch = str.charAt(i);

            if (ch >= "a" && ch <= "z")
                str = str.slice(0, i) + ch.toUpperCase() + str.slice(i+1);
        }

        return str;
    }
function $$core$$toLatinUpperCase (str) {
        var i = str.length;

        while (i--) {
            var ch = str.charAt(i);

            if (ch >= "a" && ch <= "z")
                str = str.slice(0, i) + ch.toUpperCase() + str.slice(i+1);
        }

        return str;
    }
function $$core$$toLatinUpperCase ( str ) { var i = str . length ; while ( i -- ) { var ch = str . charAt ( i ) ; if ( ch >= "a" && ch <= "z" ) str = str . slice ( 0 , i ) + ch . toUpperCase ( ) + str . slice ( i + 1 ) ; } return str ; }
Convert only a-z to uppercase as per section 6.1 of the spec
Convert only a - z to uppercase as per section 6 . 1 of the spec