* data/lalr1.cc: Extensive Doxygenation.

(error_): Rename as...
(error): this, since it is visible to the user.
Adjust callers.
(Parser::message): Now an automatic variable from...
(Parser::yyreport_syntax_error_): here.
* tests/actions.at, tests/calc.at, tests/regression.at: Adjust to
Parser::error.
* tests/input.at: Escape $.

tests/actions.at

@@ -311,9 +311,9 @@ yylex (]AT_LEX_FORMALS[)
 ]AT_LALR1_CC_IF(
 [/* A C++ error reporting function. */
 void
-yy::Parser::error_ ()
+yy::Parser::error (const Location& l, const std::string& m)
 {
-  printf ("%d-%d: %s\n", RANGE (location), message.c_str());
+  printf ("%d-%d: %s\n", RANGE (l), m.c_str());
 }
 
 static bool yydebug;