Apply clippy suggestions

Author: djc

src/bin/cargo-flamegraph.rs

@@ -202,7 +202,7 @@ fn workload(opt: &Opt, artifacts: &[Artifact]) -> anyhow::Result<Vec<String>> {
 
     const NONE: u32 = 0;
     if !opt.dev && debug_level.unwrap_or(NONE) == NONE {
-        let profile = match opt.example.as_ref().or_else(|| opt.bin.as_ref()) {
+        let profile = match opt.example.as_ref().or(opt.bin.as_ref()) {
             Some(_) => "release",
             // tests use the bench profile in release mode.
             _ => "bench",

src/lib.rs

@@ -160,7 +160,7 @@ mod arch {
                     if i > 0 {
                         escaped.push(' ');
                     }
-                    escaped.push_str(&arg.replace(" ", "\\ "));
+                    escaped.push_str(&arg.replace(' ', "\\ "));
                 }
 
                 command.arg("-c");