portupgrade 2.4.6 -- quoting still broken

[Kostik Belousov]

Using the portupgrade 2.4.6 from stable port, I used the WITH_GECKO="firefox"
in the MAKE_ARGS. And, below is the output of the portupgrade. Note
quoting.

--->  Installing the new version via the port with make flags: WANT_OPENLDAP_VER=23 WANT_OPENLDAP_SASL=yes WITH_BDB_VER=44 "WITH_GECKO=\"firefox\" WITH_UNIXODBC=yes GNUSTEP_WITH_GCC42=yes EMACS_PORT_NAME=emacs22 PYTHON_DEFAULT_VERSION=python2.5 DISABLE_VULNERABILITIES=yes NO_IGNORE=yes"

My MAKE_ARGS are defined like this:

  MAKE_ARGS = {
        '*' => ['WANT_OPENLDAP_VER=23',
                'WANT_OPENLDAP_SASL=yes',
                'WITH_BDB_VER=44',
                'WITH_GECKO=firefox',
...
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