Fix clippy warnings

src/benchmark/mod.rs

@@ -288,7 +288,7 @@ impl<'a> Benchmark<'a> {
                     "  Time ({} ≡):        {:>8}  {:>8}     [User: {}, System: {}]",
                     "abs".green().bold(),
                     mean_str.green().bold(),
-                    "        ".to_string(), // alignment
+                    "        ", // alignment
                     user_str.blue(),
                     system_str.blue()
                 );

src/export/asciidoc.rs

@@ -85,7 +85,7 @@ fn table_row(entry: &BenchmarkResultWithRelativeSpeed, unit: Unit) -> Vec<u8> {
          | {min} \n\
          | {max} \n\
          | {rel}{rel_stddev} \n",
-        command = result.command.replace("|", "\\|"),
+        command = result.command.replace('|', "\\|"),
         mean = mean_str,
         stddev = stddev_str,
         min = min_str,

src/export/markup.rs

@@ -86,7 +86,7 @@ fn determine_unit_from_results(results: &[BenchmarkResult]) -> Unit {
 
 impl<T: MarkupExporter> Exporter for T {
     fn serialize(&self, results: &[BenchmarkResult], unit: Option<Unit>) -> Result<Vec<u8>> {
-        let unit = unit.unwrap_or_else(|| determine_unit_from_results(&results));
+        let unit = unit.unwrap_or_else(|| determine_unit_from_results(results));
         let entries = relative_speed::compute(results);
         if entries.is_none() {
             return Err(anyhow!(