small clippy fixes

Author: ZeWaka

src/http.rs

@@ -148,7 +148,7 @@ fn submit_request(prep: RequestPrep) -> Result<String> {
     }
 
     if let Some(output_filename) = prep.output_filename {
-        let mut writer = std::io::BufWriter::new(std::fs::File::create(&output_filename)?);
+        let mut writer = std::io::BufWriter::new(std::fs::File::create(output_filename)?);
         std::io::copy(&mut response, &mut writer)?;
         writer.flush()?;
     } else {

src/log.rs

@@ -31,12 +31,12 @@ byond_fn!(fn log_write(path, data, ...rest) {
             // write first line, timestamped
             let mut iter = data.split('\n');
             if let Some(line) = iter.next() {
-                write!(file, "[{}] {}\n", Utc::now().format("%F %T%.3f"), line)?;
+                writeln!(file, "[{}] {}", Utc::now().format("%F %T%.3f"), line)?;
             }
 
             // write remaining lines
             for line in iter {
-                write!(file, " - {}\n", line)?;
+                writeln!(file, " - {}", line)?;
             }
         }