Enforce formatting.
@@ -37,3 +37,5 @@ echo Building examples/twi-ssd1306...
cargo build --manifest-path examples/twi-ssd1306/Cargo.toml
echo Building examples/twi-ssd1306...
cargo build --manifest-path examples/twi-ssd1306/Cargo.toml --no-default-features --features="52840" --target thumbv7em-none-eabi
+echo Checking source code formatting...
+cargo fmt -- --check
