RTEditor/src/main/java/com/onegravity/rteditor/converter/tagsoup/Parser.java
private static String trimquotes(String in) {
        if (in == null)
            return in;
        int length = in.length();
        if (length == 0)
            return in;
        char s = in.charAt(0);
        char e = in.charAt(length - 1);
        if (s == e && (s == '\'' || s == '"')) {
            in = in.substring(1, in.length() - 1);
        }
        return in;
    }
private static String trimquotes(String in) {
        if (in == null)
            return in;
        int length = in.length();
        if (length == 0)
            return in;
        char s = in.charAt(0);
        char e = in.charAt(length - 1);
        if (s == e && (s == '\'' || s == '"')) {
            in = in.substring(1, in.length() - 1);
        }
        return in;
    }
If the String is quoted, trim the quotes.