Conditionals chapter patch

[Karl Berry]

    -In all cases, the exception to the raw processing is that @code{@@} is
    -still an escape character, so the @code{@@end} command can be
    -recognized.

Why did this need to be deleted?  Is @ not an escape character inside
raw regions in some circumstances now?

I just tried a few tests and it always seemed like an escape char to me ...

    One more limitation is common to both implementations: white space is
    ignored at the beginnings of lines.

This is changed, right?  makeinfo doesn't ignore leading spaces by
default, controlled by cust.var?

k