all: update trivial formatting macros to use implicit capture

src/config.rs

@@ -75,8 +75,8 @@ impl Act for Action<'_> {
     fn apply_action(self, input: &str) -> String {
         return match self {
             Action::Replace { from, to } => input.replace(from, to),
-            Action::Prefix { prefix } => format!("{}{}", prefix, input),
-            Action::Suffix { suffix } => format!("{}{}", input, suffix),
+            Action::Prefix { prefix } => format!("{prefix}{input}"),
+            Action::Suffix { suffix } => format!("{input}{suffix}"),
             Action::Set { content } => content.to_owned(),
         };
     }

src/main.rs

@@ -32,7 +32,7 @@ fn main() -> Result<()> {
             }
             let result = subst.action.clone().apply_action(contents.deref());
             if let Err(e) = clipboard.set_contents(result.to_owned()) {
-                error!("{}", e);
+                error!("{e}");
             }
         };
         while let Ok(new_contents) = get_clipboard_contents(&mut clipboard) {