tsk-76: Improve getting path of Song or CoverArt (#81)

Closes #76

Reviewed-on: #81
Co-authored-by: phoenix <kundeng00@pm.me>
Co-committed-by: phoenix <kundeng00@pm.me>

README.md

@@ -1,2 +1,3 @@
-A library containing commonly used models and functions that is used throughout
-icarus projects. This reduces the amount of duplicated code without a benefit.
+A library containing commonly used structs, functions, enums, constants and other code
+that is used throughout the icarus projects. Code from this library serves as the model
+for other projects in the icarus project.

src/coverart.rs

@@ -80,7 +80,7 @@ impl CoverArt {
         let directory = &self.directory;
         let last_index = directory.len() - 1;
 
-        match crate::util::concatenate_path(&directory, &self.filename, last_index) {
+        match crate::util::concatenate_path(directory, &self.filename, last_index) {
             Ok(path) => Ok(path),
             Err(err) => Err(err),
         }

src/song.rs

@@ -84,7 +84,7 @@ impl Song {
         let directory = &self.directory;
         let last_index = directory.len() - 1;
 
-        match crate::util::concatenate_path(&directory, &self.filename, last_index) {
+        match crate::util::concatenate_path(directory, &self.filename, last_index) {
             Ok(path) => Ok(path),
             Err(err) => Err(err),
         }