README: Improve description of report command

README.md

@@ -94,9 +94,7 @@ formatted as line-delimited JSON.
 
 | Syntax                                     | Function                                                                      |
 |------------------------------------------- |-------------------------------------------------------------------------------|
-| `report`                                   | Show current input                                                            |
-| `report mode`                              | Show current report mode                                                      |
-| `report mode <off/on>`                     | Set report mode                                                               |
+| `report`                                   | Show latest report of channel parameters (see *Reports* section)              |
 | `pwm`                                      | Show current PWM settings                                                     |
 | `pwm <0/1> max_i_pos <amp>`                | Set maximum positive output current, clamped to [0, 2]                        |
 | `pwm <0/1> max_i_neg <amp>`                | Set maximum negative output current, clamped to [0, 2]                        |

src/command_parser.rs

@@ -694,6 +694,15 @@ mod test {
         }));
     }
 
+    #[test]
+    fn parse_pwm_polarity() {
+        let command = Command::parse(b"pwm 0 polarity reversed");
+        assert_eq!(command, Ok(Command::PwmPolarity {
+            channel: 0,
+            polarity: Polarity::Reversed,
+        }));
+    }
+
     #[test]
     fn parse_pwm_pid() {
         let command = Command::parse(b"pwm 0 pid");