Preparation for sharing

- rustfmt
- clippy
- comments
- README

src/pipeline/error/mod.rs

@@ -1,15 +1,15 @@
-mod project_error;
-mod parse_error_with_path;
-mod unexpected_directory;
 mod module_not_found;
 mod not_exported;
+mod parse_error_with_path;
+mod project_error;
 mod too_many_supers;
+mod unexpected_directory;
 mod visibility_mismatch;
 
-pub use project_error::{ErrorPosition, ProjectError};
-pub use parse_error_with_path::ParseErrorWithPath;
-pub use unexpected_directory::UnexpectedDirectory;
 pub use module_not_found::ModuleNotFound;
 pub use not_exported::NotExported;
+pub use parse_error_with_path::ParseErrorWithPath;
+pub use project_error::{ErrorPosition, ProjectError};
 pub use too_many_supers::TooManySupers;
-pub use visibility_mismatch::VisibilityMismatch;
+pub use unexpected_directory::UnexpectedDirectory;
+pub use visibility_mismatch::VisibilityMismatch;