fix: Remove leading newline in vendor output

This supersedes #11271

Author: epage

Cargo.toml

@@ -58,7 +58,7 @@ strip-ansi-escapes = "0.1.0"
 tar = { version = "0.4.38", default-features = false }
 tempfile = "3.0"
 termcolor = "1.1"
-toml_edit =  { version = "0.14.3", features = ["serde", "easy", "perf"] }
+toml_edit =  { version = "0.15.0", features = ["serde", "easy", "perf"] }
 unicode-xid = "0.2.0"
 url = "2.2.2"
 walkdir = "2.2"

benches/capture/Cargo.toml

@@ -9,4 +9,4 @@ description = "Tool for capturing a real-world workspace for benchmarking."
 cargo_metadata = "0.14.0"
 flate2 = { version = "1.0.3", default-features = false, features = ["zlib"] }
 tar = { version = "0.4.38", default-features = false }
-toml_edit = { version = "0.14.3", features = ["serde", "easy", "perf"] }
+toml_edit = { version = "0.15.0", features = ["serde", "easy", "perf"] }

crates/cargo-test-support/Cargo.toml

@@ -23,7 +23,7 @@ remove_dir_all = "0.5"
 serde_json = "1.0"
 tar = { version = "0.4.38", default-features = false }
 termcolor = "1.1.2"
-toml_edit = { version = "0.14.3", features = ["serde", "easy", "perf"] }
+toml_edit = { version = "0.15.0", features = ["serde", "easy", "perf"] }
 url = "2.2.2"
 
 [target.'cfg(windows)'.dependencies]

tests/testsuite/vendor.rs

@@ -58,8 +58,7 @@ fn vendor_sample_config() {
 
     p.cargo("vendor --respect-source-config")
         .with_stdout(
-            r#"
-[source.crates-io]
+            r#"[source.crates-io]
 replace-with = "vendored-sources"
 
 [source.vendored-sources]
@@ -103,8 +102,7 @@ fn vendor_path_specified() {
     // path is normalized by `ops::vendor` on Windows.
     assert_eq!(
         &String::from_utf8(output.stdout).unwrap(),
-        r#"
-[source.crates-io]
+        r#"[source.crates-io]
 replace-with = "vendored-sources"
 
 [source.vendored-sources]