metadata documenation - keys of key-value pairs need to be quoted as well as values in mapfiles

[karll]

In the layer documentation, there's example metadata definitions that look like this:

METADATA
    title "My layer title"
    author "Me!"
END

Actually attempting this will generate a parsing error, something along the lines of:

warning: doing set map [::mapscript::mapObj -file ./flights.map]
  error:
    code: 9
    message: Parsing error near (title):(line 426)
    routine: loadHashTable()

To parse and work correctly, the keys must be quoted as well, as in:

METADATA
    "title" "My layer title"
    "author" "Me!"
END

[havatv]

Fixed for 6.0 and trunk in r12009.