>perl -MData::Dumper -MMail::IMAPClient -we "print Dumper [@ARGV], Mail::IMAPClient->_quote_search(@ARGV)" "1 \"2\" foo" 3
$VAR1 = [
          '1 "2" foo',
          '3'
        ];
$VAR2 = '{9}
1 "2" foo';
$VAR3 = '3';

>perl -MData::Dumper -MMail::IMAPClient -we "print Dumper [@ARGV], Mail::IMAPClient->_quote_search(@ARGV)" "\"2\" foo"
$VAR1 = [
          '"2" foo'
        ];
$VAR2 = '"2" foo';