Don't print an unnecessary newline after printing format report

The Display implementation for FormatReport already prints
a newline after every error.

However, if the format report does not contain errors, we
don't want to print an empty newline.

This behavior clutters up the console output with
empty lines when rustfmt is invoked multiple times
(from .e.g a script or cargo-fmt).

So instead of using println! to print the report, we just
use print!.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/lib.rs b/src/lib.rs
index 4c7b3cbd249..e73ed86599d 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -440,7 +440,7 @@ pub fn format(file: &Path, config: &Config, mode: WriteMode) -> FileMap {
 pub fn run(file: &Path, write_mode: WriteMode, config: &Config) {
     let mut result = format(file, config, write_mode);
 
-    println!("{}", fmt_lines(&mut result, config));
+    print!("{}", fmt_lines(&mut result, config));
 
     let write_result = filemap::write_all_files(&result, write_mode, config);