linkchecker: Fix bug where fragment errors printed the wrong path.

src/tools/linkchecker/main.rs

@@ -347,7 +347,7 @@ impl Checker {
                 } else {
                     report.errors += 1;
                     print!("{}:{}: broken link fragment ", pretty_path, i + 1);
-                    println!("`#{}` pointing to `{}`", fragment, pretty_path);
+                    println!("`#{}` pointing to `{}`", fragment, target_pretty_path);
                 };
             }
         });

src/tools/linkchecker/tests/checks.rs

@@ -82,7 +82,8 @@ fn broken_fragment_local() {
 fn broken_fragment_remote() {
     broken_test(
         "broken_fragment_remote/inner",
-        "foo.html:3: broken link fragment `#somefrag` pointing to `foo.html`",
+        "foo.html:3: broken link fragment `#somefrag` pointing to \
+         `[..]/broken_fragment_remote/bar.html`",
     );
 }