patch 8.2.2486: Vim9: some errors for white space do not show context

Problem:    Vim9: some errors for white space do not show context.
Solution:   Include the text at the error.
diff --git a/src/dict.c b/src/dict.c
index b40aaef..b36b2bf 100644
--- a/src/dict.c
+++ b/src/dict.c
@@ -945,7 +945,7 @@
 	if (**arg != ':')
 	{
 	    if (*skipwhite(*arg) == ':')
-		semsg(_(e_no_white_space_allowed_before_str), ":");
+		semsg(_(e_no_white_space_allowed_before_str_str), ":", *arg);
 	    else
 		semsg(_(e_missing_dict_colon), *arg);
 	    clear_tv(&tvkey);
@@ -1025,7 +1025,7 @@
 	if (!had_comma)
 	{
 	    if (**arg == ',')
-		semsg(_(e_no_white_space_allowed_before_str), ",");
+		semsg(_(e_no_white_space_allowed_before_str_str), ",", *arg);
 	    else
 		semsg(_(e_missing_dict_comma), *arg);
 	    goto failret;