Update source_util.rs

Co-authored-by: Esteban Kuber <estebank@users.noreply.github.com>

Author: kornelski

compiler/rustc_builtin_macros/src/source_util.rs

@@ -252,7 +252,7 @@ fn load_binary_file(
                 if let Some(new_path) = new_path {
                     err.span_suggestion(
                         path_span,
-                        "there is a file in another directory",
+                        "there is a file with the same name in a different directory",
                         format!("\"{}\"", new_path.escape_debug()),
                         rustc_lint_defs::Applicability::MachineApplicable,
                     );