message: Make command line note more obvious
  I couldn't figure out a way to make it red unfortunately.
diff: # Command-Line Options
  +**Note: If `cargo bench` fails with an error message about an unknown argument, see [the FAQ](../faq.html#cargo-bench-gives-unrecognized-option-errors-for-valid-command-line-options).**
  +
  Criterion.rs benchmarks accept a number of custom command-line parameters. This
  is a list of the most common options. Run `cargo bench -- -h` to see a full
  list.
  @@ -14,10 +16,6 @@ would only run benchmarks whose ID contains the string `fib_20`
  * To save a baseline, use `cargo bench -- --save-baseline <name>`. To compare against an existing baseline, use `cargo bench -- --baseline <name>`. For more on baselines, see below.
  * To test that the benchmarks run successfully without performing the measurement or analysis (eg. in a CI setting), use `cargo test --benches`.
  -### Note:
  -
  -If `cargo bench` fails with an error message about an unknown argument, see [the FAQ](../faq.html#cargo-bench-gives-unrecognized-option-errors-for-valid-command-line-options).
  -
  ## Baselines
  By default, Criterion.rs will compare the measurements against the previous run (if any). Sometimes it's useful to keep a set of measurements around for several runs. For example, you might want to make multiple changes to the code while comparing against the master branch. For this situation, Criterion.rs supports custom baselines.
  