diff --git a/data/skeletons/bison.m4 b/data/skeletons/bison.m4
index ae4154c9..ec5cb5c8 100644
--- a/data/skeletons/bison.m4
+++ b/data/skeletons/bison.m4
@@ -384,22 +384,21 @@ m4_define([b4_glr_cc_if],
 ## Symbols.  ##
 ## --------- ##
 
-# For a description of the Symbol handling, see README.
+# For a description of the Symbol handling, see README.md.
 #
 # The following macros provide access to symbol related values.
 
 # __b4_symbol(NUM, FIELD)
 # -----------------------
-# Recover a FIELD about symbol #NUM.  Thanks to m4_indir, fails if
-# undefined.
+# Fetch FIELD of symbol #NUM.  Fail if undefined.
 m4_define([__b4_symbol],
 [m4_indir([b4_symbol($1, $2)])])
 
 
 # _b4_symbol(NUM, FIELD)
 # ----------------------
-# Recover a FIELD about symbol #NUM (or "orig NUM").  Fails if
-# undefined.
+# Fetch FIELD of symbol #NUM (or "orig NUM", see README.md).
+# Fail if undefined.
 m4_define([_b4_symbol],
 [m4_ifdef([b4_symbol($1, number)],
           [__b4_symbol(m4_indir([b4_symbol($1, number)]), $2)],
@@ -409,8 +408,9 @@ m4_define([_b4_symbol],
 
 # b4_symbol(NUM, FIELD)
 # ---------------------
-# Recover a FIELD about symbol #NUM (or "orig NUM").  Fails if
-# undefined.  If FIELD = id, prepend the token prefix.
+# Fetch FIELD of symbol #NUM (or "orig NUM").  Fail if undefined.
+#
+# If FIELD = id, prepend the token prefix.
 m4_define([b4_symbol],
 [m4_case([$2],
          [id],    [m4_do([b4_percent_define_get([api.token.prefix])],
@@ -530,6 +530,7 @@ m4_define([b4_any_token_visible_if],
 
 # b4_token_format(FORMAT, NUM)
 # ----------------------------
+# If token NUM has a visible ID, format FORMAT with ID, USER_NUMBER.
 m4_define([b4_token_format],
 [b4_token_visible_if([$2],
 [m4_format([[$1]],
diff --git a/data/skeletons/c.m4 b/data/skeletons/c.m4
index eaa1dba8..c61080b6 100644
--- a/data/skeletons/c.m4
+++ b/data/skeletons/c.m4
@@ -425,9 +425,9 @@ static const b4_int_type_for([$2]) yy$1[[]] =
 ])
 
 
-## ------------------------- ##
-## Assigning token numbers.  ##
-## ------------------------- ##
+## -------------------------- ##
+## (External) token numbers.  ##
+## -------------------------- ##
 
 # b4_token_define(TOKEN-NUM)
 # --------------------------
@@ -454,7 +454,7 @@ m4_define([b4_token_enum],
 
 # b4_token_enums
 # --------------
-# Output the definition of the tokens (if there are) as enums.
+# The definition of the tokens (if there are) as enums.
 m4_define([b4_token_enums],
 [b4_any_token_visible_if([[/* Token type.  */
 #ifndef ]b4_api_PREFIX[TOKENTYPE
@@ -471,7 +471,7 @@ m4_define([b4_token_enums],
 
 # b4_token_enums_defines
 # ----------------------
-# Output the definition of the tokens (if there are any) as enums and,
+# The definition of the tokens (if there are any) as enums and,
 # if POSIX Yacc is enabled, as #defines.
 m4_define([b4_token_enums_defines],
 [b4_token_enums[]b4_yacc_if([b4_token_defines])])