fix(credential): trim newlines in token from stdin for credential providers

Author: arlosi

src/cargo/ops/registry/login.rs

@@ -39,7 +39,7 @@ pub fn registry_login(
     let mut token_from_stdin = None;
     let token = token_from_cmdline.or_else(|| {
         if !std::io::stdin().is_terminal() {
-            let token = std::io::read_to_string(std::io::stdin()).unwrap_or_default();
+            let token = cargo_credential::read_line().unwrap_or_default();
             if !token.is_empty() {
                 token_from_stdin = Some(token);
             }

tests/testsuite/credential_process.rs

@@ -709,7 +709,7 @@ fn login_token_from_stdin() {
         .with_stdin("abcdefg\n")
         .with_stderr(
             r#"[UPDATING] [..]
-{"v":1,"registry":{"index-url":"https://github.com/rust-lang/crates.io-index","name":"crates-io"},"kind":"login","token":"abcdefg\n","login-url":"[..]"}
+{"v":1,"registry":{"index-url":"https://github.com/rust-lang/crates.io-index","name":"crates-io"},"kind":"login","token":"abcdefg","login-url":"[..]"}
 "#,
         )
         .run();

tests/testsuite/login.rs

@@ -113,6 +113,7 @@ fn empty_login_token() {
         .with_stderr(
             "\
 [UPDATING] crates.io index
+please paste the token found on [..] below
 [ERROR] credential provider `cargo:token` failed action `login`
 
 Caused by: