Fix some clippy lints

src/config.rs

@@ -110,15 +110,15 @@ pub fn get_config(
                 // 3b. or default, if the table couldn't be found.
                 .or(Ok(PartialConfig::default()))
                 // 4. assemble a 2-tuple of PartialConfigs by...
-                .and_then(|proj| {
-                    Ok((
+                .map(|proj| {
+                    (
                         // 4-1. Passing in the project-specific PartialConfig
                         proj.project_path(project),
                         // 4-2. Getting and converting to PartialConfig, or returning any Err() if one appears.
                         get_table(cfg_table, "all")
                             .and_then(PartialConfig::try_from)
                             .unwrap_or(PartialConfig::default()),
-                    ))
+                    )
                 })
                 .map(|pair| pair.0.merge(pair.1))
         })

src/main.rs

@@ -34,7 +34,7 @@ async fn main() -> Result<(), gt_tool::Error> {
         .ok_or(gt_tool::Error::MissingRepoFRQN)
         .and_then(|mut own| {
             let repo = config.repo.ok_or(gt_tool::Error::MissingRepoFRQN)?;
-            own.push_str("/");
+            own.push('/');
             own.push_str(&repo);
             Ok(own)
         });
@@ -67,7 +67,7 @@ async fn main() -> Result<(), gt_tool::Error> {
                 releases.iter().rev().map(|release| release.colorized()),
                 String::from(""),
             )
-            .map(|release| println!("{}", release))
+            .map(|release| println!("{release}"))
             .fold((), |_, _| ());
         }
         gt_tool::cli::Commands::CreateRelease {