* src/scan-code.l (SC_SYMBOL_ACTION): Accept $<tag>$, not just $$.
* data/c.m4 (b4_dollar_dollar_): New.
(b4_symbol_actions): Let b4_dollar_dollar use b4_dollar_dollar_.
* NEWS, doc/bison.texi: Document it.
* tests/actions.at: Check this for C and C++.
makeinfo --html generates index.html, and the node "Index" will result
in Index.html. On case insensitive file systems, such as on Mac OS X
by default, this results in a single, invalid, file (Texinfo 4.13).
See http://lists.gnu.org/archive/html/bug-texinfo/2012-07/msg00032.html
* doc/bison.texi (Index): Rename as...
(Index of Terms): this.
This is more consistent with the other packages, and Automake-NG
supports only *.texi.
* doc/bison.texinfo: Rename as...
* doc/bison.texi: this.
* doc/Makefile.am, examples/calc++/Makefile.am: Adjust.