Tweak installation language in toolchain install (#4811)

## Summary

Like https://github.com/astral-sh/uv/pull/4808 but with a few more
changes. I suspect this will require some bikeshedding but I find the
use of "installation" and "installed" in the same sentence to be kind of
a lot.

crates/uv-python/src/downloads.rs

@@ -407,7 +407,7 @@ impl ManagedPythonDownload {
         parent_path: &Path,
     ) -> Result<DownloadResult, Error> {
         let url = Url::parse(self.url)?;
-        let path = parent_path.join(self.key().to_string()).clone();
+        let path = parent_path.join(self.key().to_string());
 
         // If it already exists, return it
         if path.is_dir() {
@@ -429,7 +429,7 @@ impl ManagedPythonDownload {
         );
         let reader = response
             .bytes_stream()
-            .map_err(|err| std::io::Error::new(std::io::ErrorKind::Other, err))
+            .map_err(|err| io::Error::new(io::ErrorKind::Other, err))
             .into_async_read();
 
         debug!("Extracting {filename}");

crates/uv/src/commands/python/install.rs

@@ -67,13 +67,13 @@ pub(crate) async fn install(
         {
             writeln!(
                 printer.stderr(),
-                "Found installed installation `{}` that satisfies {request}",
+                "Found existing installation `{}` that satisfies {request}",
                 installation.key()
             )?;
             if force {
                 writeln!(
                     printer.stderr(),
-                    "Removing installed installation `{}`",
+                    "Removing existing installation `{}`",
                     installation.key()
                 )?;
                 fs::remove_dir_all(installation.path())?;
@@ -88,18 +88,15 @@ pub(crate) async fn install(
         if matches!(requests.as_slice(), [PythonRequest::Any]) {
             writeln!(
                 printer.stderr(),
-                "A installation is already installed. Use `uv installation install <request>` to install a specific installation.",
+                "Python is already available. Use `uv python install <request>` to install a specific version.",
             )?;
         } else if requests.len() > 1 {
             writeln!(
                 printer.stderr(),
-                "All requested installations already installed."
+                "All requested versions already installed."
             )?;
         } else {
-            writeln!(
+            writeln!(printer.stderr(), "Requested versions already installed.")?;
-                printer.stderr(),
-                "Requested installation already installed."
-            )?;
         }
         return Ok(ExitStatus::Success);
     }
@@ -107,7 +104,7 @@ pub(crate) async fn install(
     if unfilled_requests.len() > 1 {
         writeln!(
             printer.stderr(),
-            "Found {}/{} installations requiring installation",
+            "Found {}/{} versions requiring installation",
             unfilled_requests.len(),
             requests.len()
         )?;
@@ -158,7 +155,7 @@ pub(crate) async fn install(
     let s = if downloads.len() == 1 { "" } else { "s" };
     writeln!(
         printer.stderr(),
-        "Installed {} installation{s} in {}s",
+        "Installed {} version{s} in {}s",
         downloads.len(),
         start.elapsed().as_secs()
     )?;

crates/uv/src/commands/python/uninstall.rs

@@ -105,7 +105,10 @@ pub(crate) async fn uninstall(
 
     if failed {
         if matching_installations.len() > 1 {
-            writeln!(printer.stderr(), "Some Python uninstalls failed")?;
+            writeln!(
+                printer.stderr(),
+                "Failed to remove some Python installations"
+            )?;
         }
         return Ok(ExitStatus::Failure);
     }