bug#21448: 25.0.50; `unicode-property-table-internal' in Elisp manual

[Drew Adams <drew.adams@oracle.com>]

1. In node `Categories' you give an example that is incomprehensible, as
it uses function `unicode-property-table-internal', which is not
explained anywhere in the manual.  With just the doc string of that
function to go on, it is difficult, if not impossible, to understand the
example.

There is a cross-reference to node `Bidirectional Display', but that
node, although quite long (and with large, verbose paragraphs) does not
seem to help with understanding the example.  It didn't help me, at
least.

Please consider adding a little explanation of the example, including,
for instance, what table `uniprop-table' is being used for.  Adding a
docstring for the `defvar' would also help.

2. The example also not indented properly - see the second `let' binding
(which also needs to be on two lines, as it is too long if indented
properly).

3. Please consider also adding to the description of each of the
functions described in this node the statement that TABLE defaults to
the current buffer=A1=AFs category table - as opposed to having this
statement only in the sentence preceding the individual function
descriptions.  Each description acts somewhat like a doc string - it
would help if it were pretty much self-contained.

In GNU Emacs 25.0.50.1 (i686-pc-mingw32)
 of 2015-08-16 on LEG570
Bzr revision: f7ee23e587b01f179284b5554c67d579a2def676
Windowing system distributor `Microsoft Corp.', version 6.1.7601
Configured using:
 `configure --host=3Di686-pc-mingw32 --enable-checking=3Dyes,glyphs'