Port of FS205 - Syntax documentation uses inconsistent notation

[wfpokorny]

http://bugs.povray.org/task/205

(I confess to no review on porting. Christoph, I don't understand what you meant by the quick-reference section.)

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Details:

The syntax notation used in the main documentation is different than that used in the quick-reference section. This should be changed for consistency, using the superior quick-reference notation throughout.

[c-lipka]

For the records: I'm deliberately putting this on our plate for v3.8.0, if only to get a common consensus whether we want to tackle it at this point or push it back to v4.0 development.