[PATCH 01/10] tokens: style: minor fixes

[Akim Demaille]

* data/skeletons/bison.m4 (b4_symbol_kind): Dispatch on the UNDEF
token number rather than its name.
* data/skeletons/c++.m4, data/skeletons/c.m4, data/skeletons/java.m4:
Comment changes.
---
 data/skeletons/bison.m4 |  2 +-
 data/skeletons/c++.m4   | 17 +++++++++--------
 data/skeletons/c.m4     | 12 ++++++------
 data/skeletons/java.m4  | 15 ++++++++-------
 4 files changed, 24 insertions(+), 22 deletions(-)

diff --git a/data/skeletons/bison.m4 b/data/skeletons/bison.m4
index 1188739d..a2bb1cf5 100644
--- a/data/skeletons/bison.m4
+++ b/data/skeletons/bison.m4
@@ -418,9 +418,9 @@ m4_case([$1],
   [-2],                             [[YYEMPTY]],
   [0],                              [[YYEOF]],
   [1],                              [[YYERROR]],
+  [2],                              [[YYUNDEF]],
   [m4_case(b4_symbol([$1], [tag]),
       [$accept],                    [[YYACCEPT]],
-      [$undefined],                 [[YYUNDEF]],
       [b4_symbol_if([$1], [has_id], _b4_symbol([$1], [id]),
                                     [m4_bpatsubst([$1-][]_b4_symbol([$1], 
[tag]), [[^a-zA-Z_0-9]+], [_])])])])])
 
diff --git a/data/skeletons/c++.m4 b/data/skeletons/c++.m4
index b8512b44..1c77d57f 100644
--- a/data/skeletons/c++.m4
+++ b/data/skeletons/c++.m4
@@ -162,9 +162,10 @@ 
m4_bpatsubst(m4_dquote(m4_bpatsubst(m4_dquote(b4_namespace_ref[ ]),
              [::\([^][:]\|:[^:]\)*], [} ])[} // ]b4_namespace_ref])])
 
 
-## -------------------------- ##
-## (External) token numbers.  ##
-## -------------------------- ##
+## ------------- ##
+## Token kinds.  ##
+## ------------- ##
+
 
 # b4_token_enums
 # --------------
@@ -172,15 +173,15 @@ 
m4_bpatsubst(m4_dquote(m4_bpatsubst(m4_dquote(b4_namespace_ref[ ]),
 m4_define([b4_token_enums],
 [[enum yytokentype
       {
-]b4_symbol_foreach([b4_token_enum])[
-      };]dnl
+]b4_symbol_foreach([b4_token_enum])dnl
+[      };]dnl
 ])
 
 
 
-## --------------------------- ##
-## (Internal) symbol numbers.  ##
-## --------------------------- ##
+## -------------- ##
+## Symbol kinds.  ##
+## -------------- ##
 
 # b4_declare_symbol_enum
 # ----------------------
diff --git a/data/skeletons/c.m4 b/data/skeletons/c.m4
index 7e7a5c2a..dba9928b 100644
--- a/data/skeletons/c.m4
+++ b/data/skeletons/c.m4
@@ -426,9 +426,9 @@ static const b4_int_type_for([$2]) yy$1[[]] =
 ])
 
 
-## -------------------------- ##
-## (External) token numbers.  ##
-## -------------------------- ##
+## ------------- ##
+## Token kinds.  ##
+## ------------- ##
 
 # b4_token_define(TOKEN-NUM)
 # --------------------------
@@ -491,9 +491,9 @@ m4_define([b4_symbol_translate],
 
 
 
-## --------------------------- ##
-## (Internal) symbol numbers.  ##
-## --------------------------- ##
+## -------------- ##
+## Symbol kinds.  ##
+## -------------- ##
 
 # b4_symbol_enum(SYMBOL-NUM)
 # --------------------------
diff --git a/data/skeletons/java.m4 b/data/skeletons/java.m4
index bef9aa01..d09890a1 100644
--- a/data/skeletons/java.m4
+++ b/data/skeletons/java.m4
@@ -128,9 +128,10 @@ m4_define([b4_integral_parser_table_define],
 [b4_typed_parser_table_define([b4_int_type_for([$2])], [$1], [$2], [$3])])
 
 
-## -------------------------- ##
-## (External) token numbers.  ##
-## -------------------------- ##
+## ------------- ##
+## Token kinds.  ##
+## ------------- ##
+
 
 # b4_token_enum(TOKEN-NUM)
 # ------------------------
@@ -144,14 +145,14 @@ m4_define([b4_token_enum],
 # --------------
 # Output the definition of the tokens (if there are) as enums.
 m4_define([b4_token_enums],
-[b4_any_token_visible_if([/* Token kinds.  */
+[b4_any_token_visible_if([    /* Token kinds.  */
 b4_symbol_foreach([b4_token_enum])])])
 
 
 
-## --------------------------- ##
-## (Internal) symbol numbers.  ##
-## --------------------------- ##
+## -------------- ##
+## Symbol kinds.  ##
+## -------------- ##
 
 # b4_symbol_enum(SYMBOL-NUM)
 # --------------------------
-- 
2.26.0