better msg

Author: yegor256

src/main/java/org/eolang/lints/critical/LtIncorrectAlias.java

@@ -84,9 +84,8 @@ public Collection<Defect> defects(final Map<String, XML> pkg) {
                                     xmir.xpath("/program/metas/meta[head='alias'][1]/@line").get(0)
                                 ),
                                 String.format(
-                                    "Incorrect pointing alias \"%s\", since there is no \"%s\"",
-                                    pointer,
-                                    lookup
+                                    "Alias \"%s\" points to \"%s\", but it's not in scope (%d)",
+                                    pointer, lookup, pkg.size()
                                 )
                             )
                         );