Make error messages clear blocks/keywords are disallowed in index assignment

Blocks and keywords are allowed in regular index.

Also update NEWS to make this more clear.

Co-authored-by: Nobuyoshi Nakada <nobu@ruby-lang.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/parse.y b/parse.y
index fe2909c25c..1f12203e27 100644
--- a/parse.y
+++ b/parse.y
@@ -13658,10 +13658,10 @@ aryset_check(struct parser_params *p, NODE *args)
         }
     }
     if (kwds && nd_type_p(kwds, NODE_HASH) && !RNODE_HASH(kwds)->nd_brace) {
-        yyerror1(&kwds->nd_loc, "keyword arg given in index");
+        yyerror1(&kwds->nd_loc, "keyword arg given in index assignment");
     }
     if (block) {
-        yyerror1(&block->nd_loc, "block arg given in index");
+        yyerror1(&block->nd_loc, "block arg given in index assignment");
     }
 }