b5418f5134
1) An unquoted space is always a separator, even when not "in_arg". 2) When a new destination buffer must be allocated during variable substitution, only copy data from the active buffer to the new one when we *are* "in_arg". These were noticed when testing variable-substitution of variables which have null values, and are not inside quoted strings... MFC plans: after a few days, and re@ approval...