fix clippy warnings

Author: syphar

build.rs

@@ -3,6 +3,7 @@ use std::error::Error;
 fn main() -> Result<(), Box<dyn Error>> {
     // This prevents Cargo from rebuilding everything each time a non source code file changes.
     println!("cargo:rerun-if-changed=build.rs");
+    println!("cargo::rustc-check-cfg=cfg(docs_rs)");
 
     let target = std::env::var("TARGET")?;
 

src/crates/git.rs

@@ -18,7 +18,7 @@ impl GitRepo {
     pub(super) fn git_commit(&self, workspace: &Workspace) -> Option<String> {
         let res = Command::new(workspace, "git")
             .args(&["rev-parse", "HEAD"])
-            .cd(&self.cached_path(workspace))
+            .cd(self.cached_path(workspace))
             .run_capture();
 
         match res {

src/tools/binary_crates.rs

@@ -47,7 +47,7 @@ impl Tool for BinaryCrate {
     }
 
     fn install(&self, workspace: &Workspace, fast_install: bool) -> anyhow::Result<()> {
-        let mut cmd = Command::new(workspace, &Toolchain::MAIN.cargo())
+        let mut cmd = Command::new(workspace, Toolchain::MAIN.cargo())
             .args(&["install", self.crate_name])
             .timeout(None);
         if fast_install {