bug#21441: 25.0.50; doc of `make-char-table'

[Drew Adams]

The doc is inconsistent and unclear wrt the first argument.

In (elisp) `Char-Tables' the arg is named SUBTYPE.  In the doc string it
is named PURPOSE.  Why SUBTYPE and not TYPE?  There is no parent type
described anywhere, for which this arg would be the SUBtype.

Please make the doc clearer, reconciling the treatment of the arg as a
"purpose" and as a "subtype".


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=i686-pc-mingw32 --enable-checking=yes,glyphs'