Correcting escaping

Still not 100% sure it's good

src/main.rs

@@ -139,11 +139,9 @@ impl RustDoomLauncher {
             Ok((launch, comms)) => {
                 let mut command_string = String::new();
                 // Feels like a bit of a hack, but it works I think
-                command_string.push_str(&Cow::from(launch).to_string());
+                command_string.push_str(&format!(" '{}'", launch));
                 for c in comms {
-                    command_string.push_str(" \'");
-                    command_string.push_str(c);
-                    command_string.push('\'')
+                    command_string.push_str(&format!(" '{}'", c));
                 }
                 command_string
             }