Port cli_inst_interactive to CliTestContext

Author: djc

tests/suite/cli_inst_interactive.rs

@@ -167,11 +167,7 @@ Default host triple? [{0}]
 #[test]
 fn installer_shows_default_toolchain_as_stable() {
     let cx = CliTestContext::from(Scenario::SimpleV2);
-    let out = run_input(
-        &cx.config,
-        &["rustup-init", "--no-modify-path"],
-        "2\n\n",
-    );
+    let out = run_input(&cx.config, &["rustup-init", "--no-modify-path"], "2\n\n");
 
     println!("-- stdout --\n {}", out.stdout);
     println!("-- stderr --\n {}", out.stderr);
@@ -207,11 +203,7 @@ Default toolchain? (stable/beta/nightly/none) [nightly]
 #[test]
 fn installer_shows_default_profile() {
     let cx = CliTestContext::from(Scenario::SimpleV2);
-    let out = run_input(
-        &cx.config,
-        &["rustup-init", "--no-modify-path"],
-        "2\n\n\n",
-    );
+    let out = run_input(&cx.config, &["rustup-init", "--no-modify-path"], "2\n\n\n");
 
     println!("-- stdout --\n {}", out.stdout);
     println!("-- stderr --\n {}", out.stderr);
@@ -275,11 +267,7 @@ Modify PATH variable? (y/N)
 #[test]
 fn user_says_nope() {
     let cx = CliTestContext::from(Scenario::SimpleV2);
-    let out = run_input(
-        &cx.config,
-        &["rustup-init", "--no-modify-path"],
-        "n\n\n",
-    );
+    let out = run_input(&cx.config, &["rustup-init", "--no-modify-path"], "n\n\n");
     assert!(out.ok);
     assert!(!cx.config.cargodir.join("bin").exists());
 }
@@ -470,7 +458,7 @@ fn test_prompt_fail_if_rustup_sh_already_installed_reply_nothing() {
 fn test_prompt_fail_if_rustup_sh_already_installed_reply_no() {
     let cx = CliTestContext::from(Scenario::SimpleV2);
     cx.config.create_rustup_sh_metadata();
-    let out = run_input(&mut cx.config, &["rustup-init", "--no-modify-path"], "no\n");
+    let out = run_input(&cx.config, &["rustup-init", "--no-modify-path"], "no\n");
     assert!(!out.ok);
     assert!(out
         .stderr
@@ -483,10 +471,10 @@ fn test_prompt_fail_if_rustup_sh_already_installed_reply_no() {
 
 #[test]
 fn test_prompt_succeed_if_rustup_sh_already_installed_reply_yes() {
-    let mut cx = CliTestContext::from(Scenario::SimpleV2);
+    let cx = CliTestContext::from(Scenario::SimpleV2);
     cx.config.create_rustup_sh_metadata();
     let out = run_input(
-        &mut cx.config,
+        &cx.config,
         &["rustup-init", "--no-modify-path"],
         "yes\n\n\n",
     );
@@ -508,7 +496,7 @@ fn installing_when_already_installed_updates_toolchain() {
     let mut cx = CliTestContext::from(Scenario::SimpleV2);
     cx.config
         .expect_ok(&["rustup-init", "-y", "--no-modify-path"]);
-    let out = run_input(&mut cx.config, &["rustup-init", "--no-modify-path"], "\n\n");
+    let out = run_input(&cx.config, &["rustup-init", "--no-modify-path"], "\n\n");
     println!("stdout:\n{}\n...\n", out.stdout);
     assert!(out
         .stdout