applies rustfmt to cleanup

uses std::env::current_dir to find out where the tests are running from

src/lib.rs

@@ -1,4 +1,4 @@
-pub mod number_system_conversion;
-pub mod test_compression;
 pub mod data_to_text;
 pub mod duration_to_string;
+pub mod number_system_conversion;
+pub mod test_compression;