* doc/bison.texinfo (Decl Summary): In the %language entry, mention

* doc/bison.texinfo (Decl Summary): In the %language entry, mention
that the argument is case-insensitive, and there's no `=' here.
For the %skeleton entry, mention that %language is better.
(Bison Options): Likewise for --language and --skeleton.  Move the
--skeleton entry so that the `Tuning the parser' section is sorted
alphabetically on long options.
(C++ Bison Interface): Don't use the word skeleton.  Don't explain the
%language directive in detail here; cross-reference the %language
documentation instead.
(Calc++ Parser): Use `%require "@value{VERSION}"' rather than
`%require "2.3b"' so that the example is always up-to-date.
(Bison Symbols): Add entries for %language and %skeleton.
* examples/extexi (normalize): Instead of replacing every %require
argument with the current Bison version, just substitute for
`@value{VERSION}'.  This guarantees that we're testing what actually
appears in the documentation.
* examples/calc++/Makefile.am ($(calc_extracted)): Use `$(VERSION)'
rather than `@VERSION@'.