Re: [Libguestfs] [PATCH] guestfish: Enable grouping in string lists

This change adds the ability to group entries in a string list with single quotes. So the string: "'foo bar'" becomes 1 token rather than 2. Consequently single quotes must now be escaped: "\'" resolves to a literal single quote. Incidentally, this change also alters another, probably unintentional behaviour of the previous implementation, in that tokens are separated by any amount of whitespace rather than a single whitespace character. I.e.: "a b" resolves to: 'a' 'b' rather than: 'a' '' 'b' That last syntax can be used if an empty argument is still desired. Whitespace is now also defined to include tabs. parse_string_list can also now fail if it contains an unmatched open quote.