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Re: prop_dictionary_make_immutable

>>> +   if (prop_dictionary_is_immutable(pd) == false)
>> Surely, if we are goig to use 'bool' this should be just:
>>      if (!prop_dictionary_is_immutable(pd))
> Uh, what's the difference?

The same as the difference between return(0); and return 0;, or between

        if (something())
         { printf("strangeness %d\n",reason());
        if (something ())
                printf ("strangeness %d\n", reason ());

That is to say, source-code aesthetics.  Presumably David thinks that
the if (! ...) style is preferable for use with a routine that
conceptually returns a boolean value (a position I agree with).

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