[librsvg: 1/4] Correct wrong comment

[Marge Bot <marge-bot src gnome org>]

commit 728208b53938cfe1b9e2049b5a6781962123bebd
Author: Kolja Lampe <klampe slashwhy de>
Date:   Fri Oct 15 11:04:28 2021 +0200

    Correct wrong comment
    
    Part-of: <https://gitlab.gnome.org/GNOME/librsvg/-/merge_requests/608>

 tests/src/reference.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/tests/src/reference.rs b/tests/src/reference.rs
index ce321d2f..9eaa49f7 100644
--- a/tests/src/reference.rs
+++ b/tests/src/reference.rs
@@ -89,7 +89,7 @@ fn reference_test(path: &str) {
         .evaluate(&output_surf, &path_base_name);
 }
 
-/// Turns `/foo/bar/baz.svg` into `/foo/bar/baz-ref.svg`.
+/// Turns `/foo/bar/baz.svg` into `/foo/bar/baz-ref.png`.
 fn reference_path(path: &PathBuf) -> PathBuf {
     let basename = path.file_stem().unwrap();