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Rather than intermixing the discussion of text-string and binary-string functions, make a clean break, moving all discussion of binary-string operations into section 9.5. This involves some duplication of function descriptions between 9.4 and 9.5, but it seems cleaner on the whole since the individual descriptions are clearer (and on the other side of the coin, it gets rid of some duplicated descriptions, too). Move the convert*/encode/decode functions to a separate table, because they don't quite seem to fit under the heading of "binary string functions". Also provide full documentation of the textual formats supported by encode() and decode() (which was the original goal of this patch series, many moons ago). Also move the table of built-in encoding conversions out of section 9.4, where it no longer had any relevance whatsoever, and put it into section 23.3 about character sets. I chose to put both that and table 23.2 (multibyte-translation-table) into a new <sect2> so as not to break up the flow of discussion in 23.3.3. Also do a bunch of minor copy-editing on the function descriptions in 9.4 and 9.5. Karl Pinc, reviewed by Fabien Coelho, further hacking by me Discussion: https://postgr.es/m/20190304163347.7bca4897@slate.meme.com
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