FYI: master: doc: remove the "experimental" warning for some features

[Akim Demaille]

I installed this.

There are some features I have left as ‘experimental’, because
I have not used them extensively myself: LAC, push parsers, and
some other things.  User feedback would be most welcome :)

commit 48828e779f7a81be80fd2c92c54b86aa1357990d
Author: Akim Demaille <address@hidden>
Date:   Sun Aug 12 09:15:01 2018 +0200

    doc: remove the "experimental" warning for some features
    
    Several features were flagged 'experimental' and waiting for user
    feedback to 'stabilize', but i. AFAIK, no user ever reported anything
    about them, ii. they'be been here long enough to prove they don't do
    harm.
    
    * doc/bison.texi: No longer experimental: default %printer and
    %destructor (typed: <*> and untyped: <>), %define api.value.type union
    and variant, Java parsers, XML output, LR family (lr, ielr, lalr),
    semantic predicates (%?).

diff --git a/doc/bison.texi b/doc/bison.texi
index df2d4d97..470fdc6e 100644
--- a/doc/bison.texi
+++ b/doc/bison.texi
@@ -3802,8 +3802,6 @@ This Bison extension cannot work if @code{%yacc} (or
 generate tokens as macros (e.g., @samp{#define INT 258}, or @samp{#define
 TOK_INT 258}).
 
-This feature is new, and user feedback would be most welcome.
-
 A similar feature is provided for C++ that in addition overcomes C++
 limitations (that forbid non-trivial objects to be part of a @code{union}):
 @samp{%define api.value.type variant}, see @ref{C++ Variants}.
@@ -4977,9 +4975,6 @@ grammar symbol that has that semantic type tag unless 
that symbol has its own
 per-symbol @code{%destructor}.
 
 Finally, you can define two different kinds of default @code{%destructor}s.
-(These default forms are experimental.
-More user feedback will help to determine whether they should become permanent
-features.)
 You can place each of @code{<*>} and @code{<>} in the @var{symbols} list of
 exactly one @code{%destructor} declaration in your grammar file.
 The parser will invoke the @var{code} associated with one of these whenever it
@@ -5972,8 +5967,8 @@ The symbols are defined with type names, from which Bison 
will generate a
 %token <int> INT "integer"
 %token <char *> STR "string"
 @end example
-This feature needs user feedback to stabilize.  Note that most C++ objects
-cannot be stored in a @code{union}.
+Most C++ objects cannot be stored in a @code{union}, use @samp{variant}
+instead.
 
 @item @samp{variant} (C++)
 This is similar to @code{union}, but special storage techniques are used to
@@ -5983,7 +5978,6 @@ allow any kind of C++ object to be used. For instance:
 %token <int> INT "integer"
 %token <std::string> STR "string"
 @end example
-This feature needs user feedback to stabilize.
 @xref{C++ Variants}.
 
 @item @address@hidden@address@hidden
@@ -6109,8 +6103,7 @@ introduced as @code{lr.keep_unreachable_states} in 2.3b, 
renamed as
 @item Language(s): all
 
 @item Purpose: Specify the type of parser tables within the
-LR(1) family.  @xref{LR Table Construction}.  (This feature is experimental.
-More user feedback will help to stabilize it.)
+LR(1) family.  @xref{LR Table Construction}.
 
 @item Accepted Values: @code{lalr}, @code{ielr}, @code{canonical-lr}
 
@@ -8109,9 +8102,6 @@ values for @var{type} are:
 @item @code{ielr}
 @item @code{canonical-lr}
 @end itemize
-
-(This feature is experimental. More user feedback will help to stabilize
-it.)
 @end deffn
 
 For example, to activate IELR, you might add the following directive to you
@@ -10364,8 +10354,6 @@ Output an XML report of the parser's automaton computed 
by Bison.
 @address@hidden is optional.
 If omitted and the grammar file is @file{foo.y}, the output file will be
 @file{foo.xml}.
-(The current XML schema is experimental and may evolve.
-More user feedback will help to stabilize it.)
 @end table
 
 @node Option Cross Key
@@ -11576,9 +11564,6 @@ main (int argc, char *argv[])
 @subsection Java Bison Interface
 @c - %language "Java"
 
-(The current Java interface is experimental and may evolve.
-More user feedback will help to stabilize it.)
-
 The Java parser skeletons are selected using the @code{%language "Java"}
 directive or the @option{-L java}/@option{--language=java} option.
 
@@ -11962,9 +11947,6 @@ available only if location tracking is active.
 @c - define push_parse
 @findex %define api.push-pull
 
-(The current push parsing interface is experimental and may evolve. More
-user feedback will help to stabilize it.)
-
 Normally, Bison generates a pull parser for Java.
 The following Bison declaration says that you want the parser to be a push
 parser (@pxref{%define Summary,,api.push-pull}):
@@ -12717,10 +12699,6 @@ GLR parsers during nondeterministic operation,
 this silently causes an alternative parse to die.  During deterministic
 operation, it is the same as the effect of YYERROR.
 @xref{Semantic Predicates}.
-
-This feature is experimental.
-More user feedback will help to determine whether it should become a permanent
-feature.
 @end deffn
 
 @deffn {Construct} /* @dots{} */
@@ -12746,10 +12724,6 @@ Separates alternate rules for the same result 
nonterminal.
 Used to define a default tagged @code{%destructor} or default tagged
 @code{%printer}.
 
-This feature is experimental.
-More user feedback will help to determine whether it should become a permanent
-feature.
-
 @xref{Destructor Decl, , Freeing Discarded Symbols}.
 @end deffn
 
@@ -12757,10 +12731,6 @@ feature.
 Used to define a default tagless @code{%destructor} or default tagless
 @code{%printer}.
 
-This feature is experimental.
-More user feedback will help to determine whether it should become a permanent
-feature.
-
 @xref{Destructor Decl, , Freeing Discarded Symbols}.
 @end deffn