Fix Clippy warnings from the useless_borrows_in_formatting lint

This new lint "detects format!-style macros where an argument is passed
with an explicit & but the value is already a reference, resulting in a
double reference" [0].

[0]: https://rust-lang.github.io/rust-clippy/beta/index.html#useless_borrows_in_formatting

Signed-off-by: Michael Weiss <michael.weiss@bull.com>

Author: primeos-work

src/commands/source/download.rs

@@ -142,7 +142,7 @@ async fn perform_download(
 
     let response = match client.execute(request).await {
         Ok(resp) => resp,
-        Err(e) => return Err(e).with_context(|| anyhow!("Downloading '{}'", &source.url())),
+        Err(e) => return Err(e).with_context(|| anyhow!("Downloading '{}'", source.url())),
     };
 
     if response.status() != reqwest::StatusCode::OK {
@@ -151,7 +151,7 @@ async fn perform_download(
             response.status(),
             reqwest::StatusCode::OK
         ))
-        .with_context(|| anyhow!("Downloading \"{}\" failed", &source.url()));
+        .with_context(|| anyhow!("Downloading \"{}\" failed", source.url()));
     }
 
     progress

src/repository/fs/representation.rs

@@ -162,7 +162,7 @@ impl FileSystemRepresentation {
             anyhow!(
                 "The path `{}` doesn't include the repo root `{}`",
                 path.display(),
-                &self.root.display()
+                self.root.display()
             )
         })?;
         let mut curr_hm = &self.elements;
@@ -203,7 +203,7 @@ impl FileSystemRepresentation {
             anyhow!(
                 "The path `{}` doesn't include the repo root `{}`",
                 path.display(),
-                &self.root.display()
+                self.root.display()
             )
         })?;
         let mut curr_hm = &self.elements;