patch 8.2.2480: 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/vim9script.c b/src/vim9script.c
index 010b4bf..387c9be 100644
--- a/src/vim9script.c
+++ b/src/vim9script.c
@@ -629,7 +629,7 @@
     }
     if (!VIM_ISWHITE(p[1]))
     {
-	semsg(_(e_white_space_required_after_str), ":");
+	semsg(_(e_white_space_required_after_str_str), ":", p);
 	return arg + STRLEN(arg);
     }
     name = vim_strnsave(arg, p - arg);