> Attached: doc_base64_v7.patch
Patch applies cleanly, doc compiles, navigation tested and ok.
"... section 6.8" -> "... Section 6.8" (capital S).
"The string and the binary encode and decode functions..." sentence looks 
strange to me, especially with the English article that I do not really 
master, so maybe it is ok. I'd have written something more 
straightforward, eg: "Functions encode and decode support the following 
encodings:", and also I'd use a direct "Function <...>decode</...> ..." 
rather than "The <function>decode</function> function ..." (twice).
Maybe I'd use the exact same grammatical structure for all 3 cases, 
starting with "The <>whatever</> encoding converts bla bla bla" instead of 
varying the sentences.
Otherwise, all explanations look both precise and useful to me.
-- 
Fabien.