tor-config: tests: Apply standard lint block in sources.rs

Fixes a spurious clippy warning on nightly, about a dbg!

crates/tor-config/src/sources.rs

@@ -395,7 +395,15 @@ fn is_syntactically_directory(p: &Path) -> bool {
 
 #[cfg(test)]
 mod test {
+    // @@ begin test lint list maintained by maint/add_warning @@
+    #![allow(clippy::bool_assert_comparison)]
+    #![allow(clippy::clone_on_copy)]
+    #![allow(clippy::dbg_macro)]
+    #![allow(clippy::print_stderr)]
+    #![allow(clippy::print_stdout)]
     #![allow(clippy::unwrap_used)]
+    //! <!-- @@ end test lint list maintained by maint/add_warning @@ -->
+
     use super::*;
     use itertools::Itertools;
     use tempfile::tempdir;