Gorm bug

[Enrico Sersale]

GormDocument, in -parseHeader:, fails to get the name of a superClass if
after its name there is a space. So:

  [classScanner scanUpToString: @"\n" intoString: &superClassName];

should be:

  [classScanner scanUpToCharactersFromSet: aSet
                               intoString: &superClassName];

where aSet should be:

  [NSCharacterSet characterSetWithCharactersInString: @" \n"]

(note the space)