patch 8.2.3957: error messages are spread out

Problem:    Error messages are spread out.
Solution:   Move more errors to errors.h.
diff --git a/src/vim9cmds.c b/src/vim9cmds.c
index d341154..eb28a79 100644
--- a/src/vim9cmds.c
+++ b/src/vim9cmds.c
@@ -1520,11 +1520,11 @@
 	if (scope == NULL)
 	    emsg(_(e_no_endtry));
 	else if (scope->se_type == WHILE_SCOPE)
-	    emsg(_(e_endwhile));
+	    emsg(_(e_missing_endwhile));
 	else if (scope->se_type == FOR_SCOPE)
-	    emsg(_(e_endfor));
+	    emsg(_(e_missing_endfor));
 	else
-	    emsg(_(e_endif));
+	    emsg(_(e_missing_endif));
 	return NULL;
     }