Fix "unnecessary trailing semicolon" warning on Rust 1.51

Author: phil-opp

Changelog.md

@@ -1,5 +1,7 @@
 # Unreleased
 
+- Fix "unnnecessary trailing semicolon" warning on Rust 1.51
+
 # 0.10.2 – 2020-12-10
 
 - Fix nightly breakage of doctests in workspaces ([#69](https://github.com/rust-osdev/bootimage/pull/69))

src/args/build.rs

@@ -30,7 +30,7 @@ impl BuildCommand {
                     return Err(anyhow!("multiple arguments of same type provided"));
                 }
                 Ok(())
-            };
+            }
 
             let mut arg_iter = args;
             while let Some(arg) = arg_iter.next() {