Fix README markdown lints

Author: Sh3Rm4n

README.md

@@ -170,14 +170,16 @@ compile with older versions but that may change in any new patch release.
 
 ### Running Tests
 
-Tests are run via the integration test pattern and are executed on a target chip, rather than on a host system.
-First, install [probe-run](https://crates.io/crates/probe-run) via `cargo install probe-run`.
-Next, you'll need to modify `.cargo/config` to link defmt and use `probe-run` configured for your chip.
-See details within the comments in that file.
+Tests are run via the integration test pattern and are executed on a target
+chip, rather than on a host system. First, install
+[probe-run](https://crates.io/crates/probe-run) via `cargo install probe-run`.
+Next, you'll need to modify `.cargo/config` to link defmt and use `probe-run`
+configured for your chip. See details within the comments in that file.
 
-Now, you can execute a test by setting your device, defmt, and any test specific features:
+Now, you can execute a test by setting your device, defmt, and any test specific
+features:
 
-```
+```bash
 cargo test --test rcc --features=stm32f303xc,defmt,rt
 ```