small fixes

Author: tinaun

src/godbolt.rs

@@ -34,7 +34,7 @@ struct GodboltResponse {
 }
 
 pub fn help(args: Args) -> Result<(), crate::Error> {
-    let message = "Compile Rust code using https://rust.godbolt.org/. Full optimizations are applied unless overriden.
+    let message = "Compile Rust code using <https://rust.godbolt.org/>. Full optimizations are applied unless overriden.
 ```?godbolt flags={} rustc={} ``\u{200B}`code``\u{200B}` ```
 Optional arguments:
     \tflags: flags to pass to rustc invocation. Defaults to \"-Copt-level=3 --edition=2018\".
@@ -61,6 +61,7 @@ pub fn compile_rust_source(
             return Ok(Compilation::Error { stderr: e });
         }
     };
+    info!("cv: rustc {}", cv);
 
     let response: GodboltResponse = http
         .execute(

src/main.rs

@@ -150,7 +150,7 @@ fn app() -> Result<(), Error> {
     }
 
     cmds.add("?godbolt flags={} version={} ```\ncode```", |args| {
-        let flags = args.params.get("flags").unwrap_or(&"false");
+        let flags = args.params.get("flags").unwrap_or(&"-Copt-level=3 --edition=2018");
         let rustc = args.params.get("rustc").unwrap_or(&"nightly");
 
         let code = args